This signal was replaced by color lights in late 2012.


For Starters
 Signal Variations
Signal Pictures
Other Pictures

For CPL and PL signals in Perryville MD, click here.
For CPL and PL signals from Aberdeen MD north, click here.


The Mechanics of the CPL Signal
The CPL Lamp Assembly
CPL Primer
the Aspects
Catalog Drawings
Michael Watnoski’s Primer on CPL’s


CPL, or Color Position Light signals were exclusive to the Baltimore and Ohio Railroad, and its affiliates.  You could find them anywhere the B&O went.   However, now that all of the former B&O lines are part of CSX, they have been accelerating their efforts to replace the CPL's with modern 3 color light signals everywhere (yuk).

As with the Pennsy Position Light signals, the B&O Color Position Light signals were an attempt by the designer to simulate, or mimic the position capability of an upper quadrant semaphore signal.  But, in contrast to the Pennsy signals, the B&O decided to use color in addition to position for their aspects.  This provided a margin of safety in the event one of the two lamps was out.

Other railroads using CPL's are the Staten Island Rapid Transit (SIRT, now part of the MTA), the former B&O Chicago Terminal, and the former Chicago and Alton.  Dwarf CPL's were also chosen to be used in and out of Union Station in Washington DC, although they appear on signal bridges above the tracks.

The first installation of CPL’s on the B&O was between Deshler and Hamlet OH.  In December of 1924, the B&O announced that it had ordered 77 sets of CPL’s for the Staten Island Rapid Transit, and they are still in use today despite an announcement several years ago that they were going to replace them.

CPL dwarf signals also enjoy being the only dwarfs which, if so outfitted, can display ALL of the aspects of a high signal.  The only one I ever saw so configured was at the B&O Railroad Museum in Baltimore.  However, I don't know if the signal before it came to the museum was originally in this form, or if it was put together just for display.  Since the snow cave-in of 2003, the signal has not been on display because the museum has decided not to use the outside wall for displaying much of anything.

A fellow by the name of Frank Patenall designed the signals for the B&O around 1925.  Patenall came to America in 1885, and worked for US&S before coming to the B&O in 1891.  Some sources state that he developed the CPL signal concurrent with the development of the Pennsy’s PL signal, while others say he watched the development of the PL, and then “improved” on it by incorporating color to make it a “safer” signal.  BTW, Pennsy installed its first Tombstone PL signals in 1915, so the latter statement may be true.   Patenall was also the developer of approach lighting according to Brian Solomon in his book, "Railroad Signaling".

The signal was originally designed to display 14 aspects, but the current CSX rulebook contains 17 of them (it's interesting to note that 10 of them are green variations).  Although the signal is capable of displaying 29 aspects (including flashing indications), many would be impractical, such as a slow speed stop, or modifications to the restricting aspect, they just don't make any sense.  This is one reason why flashing is used to modify and upgrade a signals indication.

At first, the CPL signal may seem confusing, but after reading the principles behind it, it’s fairly straightforward in its interpretation…. There is a system!

The signals were originally manufactured by Hall, but later GRS and US&S made the signals, with the majority of them being made by US&S.  The most popular designation for the dwarf CPL is US&S type VA.  The full size signal is type “G”, which is why it’s confusing to refer to color light signals as type “G”.  Type "G" color light signals are ones with the three aspects in a triangular placement, usually with a round background.

  A GRS type "G" color light signal for comparison purposes, nicknamed "trilights"

The Mechanics of the CPL Signal

The main CPL signal "head" consists of a number of individual lamp assemblies mounted to a circular background 3’-4" in diameter.  There could be anywhere from one to as many as four aspects displayed on the main part of the signal.  The pictures below illustrate some of the possibilities.

The background is mounted to the mast with two heavy duty steel straps and U-bolts.  The background itself is stamped from a piece of 1/4” thick steel, and has a 1 3/4” lip all the way around to strengthen the assembly, since the lamps mount to the background.  Newer versions are stamped from aluminum, not sure when the changeover took place.  The background has eight 7-5/16” holes stamped in it to allow mounting of the lamp assemblies, three 3/8” holes for each lamp assembly for mounting, and a 11/16" diameter hole above the lamp for sighting/aiming.  There are eight (8) 7/16" holes for mounting to the brackets with 3/8" bolts.  The two photos below show the lip and the lamp mounting hole.


Mounted to the backside of the background is a junction box, where the cables from the relay cabinet terminate, and individual wires go out to the lamp assemblies.  On some older installations, a separate transformer was used for each lamp pair, and they were mounted in the junction box.  The transformers were used to step down the 120VAC to 10-12 volts.  Because the 120VAC is mixed in with the low voltage, they eventually decided to remove them from the junction box altogether (probably for safety reasons), but also because it was more expensive to provide a separate transformer for each indication (pure speculation, though).  Judging from an installation in Gaithersburg MD, where they replaced CPL's with color light signals, it looks like the wires supplying current to the lamps are #6 gauge.

A GRS junction box, and the mounting holes for it viewed from the front.

All of this stuff is mounted to a 5" outside diameter mast, up to 20 feet high.  If the signal needs to be mounted higher, a 6" pole is used.

Unused positions are blanked by a 10-1/2" diameter plate, 1/16" thick and held into place by two or three screws, something on the order of #10's.

Most CPL signals also had what are known as marker lamps located above and/or below the main signal head.  Very few CPL signals consisted just of a main signal head, most had at least one marker lamp.  If it was a high signal, the sole white marker lamp was usually directly above, so the signal could display a clear aspect (rule 281), upgrading the signal from a slow speed signal….. Without the marker lamp, the green indication was slow-approach slow (rule 287A).

A fully populated CPL would contain fourteen (14) lamp assemblies, two lamps for each aspect on the main head: green, yellow, red, and lunar; two (2) yellow markers to the right; and four (4) white markers to the left and center.  Very, very few CPL's have a full compliment of 14 lamps.  The only one around used to be in Deshler OH, but was replaced with a color light signal around 2006.  Baltimore recently (~2008) added a full CPL to the list, and we also have an almost full signal a little further south, with only the restricting aspect missing.  Sorry to report, but all of the CPL signals at Carroll interlocking were replaced with color light signals in late 2012 :-(  So much for America's last known full CPL!

One can easily see, from a cost standpoint, why CPL's are being replaced.  Besides needing a lock for each lamp, and the junction box on the back, there are all of those light bulbs to replace.  A similar color light signal only needs 9 or 10 bulbs to do the same thing.

According to B&O drawings, the majority of CPL signals placed on a single mast, were set at 17 feet above the base of the rail.  Marker lamps are placed 7 feet above and below the center of the main head, and offset from the pole by 3’-4”.  In some installations which required more height for visibility, the main head was 30 feet off the rail, with the markers still being offset by 7 feet.  The signal mast was generally set about 13’-7” from the centerline of the track.

Bracket posts were set up so the base of the bracket was 23’-4” above the rail base, and the spacing between the two signals was 10 feet.  The mast was placed 10 feet from the center of the track.

Below are the dimensions for a typical single marker lamp with a standard background.  This marker would be used in the center position, top or bottom, and would have a white lens.

The CPL Lamp

The lamp assemblies used on a CPL signal are pretty simple affairs.  A single bulb, is focused by an inner colored fresnel lens, and an 8-3/4" (basically clear) outer lens.  The outer lens for the white marker lamps are sometimes sand blasted on the inside .  There is no reflector, which prevents false indications.

As seen below in the middle photo, the lamp assembly is mounted to the main head with three bolts, and uses springs to maintain their spacing from the background.  By adjusting the nuts from the back side of the signal, the lamp could be aimed.  Signal maintainers could look through an additional hole in the background for aiming purposes (above photo showing the cutout), viewing through a tang on the lamp assembly.  The tang has a hole in it for aiming the lamp, which is clearly visible in the left photo below.  The nuts used for adjusting the lamp, in later years, used ones with a nylon insert which did not require the use of a lockwasher.




CPL Primer

While CPL signals may seem a little intimidating at first, due to the number of lamps associated with it, the system is quite systematic, and simple to interpret once the "secrets" are known......

The first thing to know is that the main signal head can display clear (green), approach (yellow), stop (red), and restricting (lunar white), but they are ALL slow speed indications without using the marker lamps to modify the indication (so OK, STOP is not a speed :-) to a higher speed. 

If any three of the lower marker lamps are lit, the signal is upgraded to a medium speed signal, telling the engineer he can pass THIS signal at medium speed. 

If any of the lamps on the top are lit, it is upgraded to a high speed signal for the block it controls, and he can pass THIS signal at normal speed: the maximum allowed by the timetable, rulebook, or indication.  The photo below is showing a clear signal (rule 281).

If either of the two left hand white markers are lit, then the engineer needs to pass the NEXT signal at medium speed.

If either of the two yellow markers on the right are lit, he needs to pass the NEXT signal at slow speed.

CSX also uses flashing to upgrade the signal in the following cases:
    If the top left marker is flashing, the signal is upgraded from approach medium (rule 282) to approach limited. (rule 281B)
    If the bottom center marker flashes, the signal goes from a medium clear (rule 283) to a limited clear (rule 281C) speed signal.
    If the green lamps are flashing, the signal is upgraded from slow approach slow (rule 287A, formerly rule 287), to slow clear (rule 287).

Current CSX speeds are below in Michael's section.

Michael Watnoski's Primer
with help from
John V Engleman





B&O Color Position Light signals, CPL's, are the most complete signal system used today.  This system is intuitive once you know the pattern.  It also conveys more information than other signal systems. At the bottom of the page, is a drawing showing the components of a fully loaded CPL signal.

Another unusual feature of this signaling system, is that CPL dwarf signals are capable of displaying all the aspects of a high signal, not just slow speed aspects as most other systems.

Speeds referred to in the CSX rulebook, which this discussion is based on, are as follows:  Limited - 45mph, Medium - 30mph, and Slow - 20mph.  Some of you may raise an eyebrow at the slow speed.  Yes, it was changed from 15!


An almost full CPL signal in south Baltimore 

The main head displays the track occupancy for the selected route.  The B&O only used a two block system.  If the next two blocks beyond the signal were were clear (not occupied), the main head displayed a "high green" for "proceed".  When the second block was occupied, the head displayed yellow for "approach", preparing to stop at the next signal. Trains exceeding medium speed were required to slow to that speed.  If the block ahead of you was occupied, the signal displayed red for stop.

If the signal was an automatic, having a number board, then this was regarded as stop and proceed in the B&O days, and is now (under CSX), a restricted proceed Stop and proceed allowed the train to move, after stopping, at restricted speed (not exceeding 15 mph), prepared to stop within half the distance of sight, while watching for stopped trains, broken rail, or misaligned switches.  If the route is set for an un-signaled track, the restricting aspect, left diagonal lunar white lights, is used.  This requires the train to travel at restricted speed, as above.

The other six lights, or marker lamps, refer to the speed rating of the route being taken immediately beyond the signal and/or at the next signal.  As shown below in the "large" drawing, the left and middle markers are white, the right markers are yellow

CPL signals, BTW, are the only signals in the United States that employ white lenses in their aspect.

No Marker Lamps

For a CPL signal with no marker lamps lit, the indications are slow signals as seen below, except for STOP.  The use of marker lamps modifies these meanings.  Without any light above or below the main head, the train is going thru switches at slow speed, and must limit speed to 15 mph until the entire train is over the switches.  The three rules without markers lamps fall low in priority except for red, which is "at the bottom":

1) green for rule C-287A, slow clear
2) yellow, rule C-288, slow approach
3) red for rule C-292, which is stop

Upper Row Markers

Any marker above the main head indicates that route is going to be the main or high speed route beyond this signal.  This allows the train to proceed at track speed on green signals, as posted in the employee timetable for the territory. 

Add a white marker to the left, and it tells the engineer to reduce the train to medium speed to approach the next signal. 

If the yellow marker on the right is lit, then he needs to slow down and approach the next signal no faster than slow speed.

Bottom Row Markers

If we add markers below the main head, they are all variations of medium speed moves. 

If we add a middle white marker, we have rule 283, Medium Clear, which states the train can proceed at medium speed through the interlocking or whatever comes after the signal.... the block ahead is clear. 

If we add a left marker, that gives us rule 283A - Medium Approach Medium, which states the engineer can proceed at medium speed, and upon seeing the nedst signal, approach it at medium speed.

If we light up the yellow marker on the right, the engineer can proceed at a medium speed till he sees the next signal, and once seeing it, must approach it at slow speed.

Yellow and Red Aspects

These aspects are in addition to the "plain" indications mentioned above, in other words, the main signal head without a marker lamp lit.

There are two yellow aspects with a marker, and one red..... all use the middle marker. 

Rule C-285 is approach, preparing to stop at the next signal.  Rule C-286 is medium approach.... medium speed thru turnouts, etc, then proceed prepared to stop at the next signal.


The red aspect with a marker is rule C-291, restricted proceed, which the indication is the same for a restricting aspect - proceed at restricted speed. It has two variations, as shown.   Many of you may be familiar with this aspect being called stop and proceed.  John adds, "during the gas shortage of the early to mid 70's, the B&O needed a way to to reduce costs, so they changed the rule to allow trains to keep rolling, looking for trains or problems ahead at no more than restricted speed". 

Other CPL Details

Rules 287A and 288 fall next to each other in priority, the only difference being 287A specifies going at slow speed to approach the next signal, while 288 says to prepare to stop at the next signal, but does not give a speed once thru the turnout.  Both mandate going at slow speed thru the turnout. 

If lit, the row of markers below the main head indicates that train will be routed over switches at medium speed.  The train must reduce to medium speed, 30 mph, until all of it is passed through the switches, then it can proceed at the track speed set by the signal.  This is the typical indication when changing tracks at a crossover. 


Use of the lower markers specifies two speeds for the train.  One is the speed thru the turnout, which as stated above, is medium speed.  The other speed referenced is the speed of the train that is authorized once the entire train has cleared the turnout.  The speeds show up in the name of the aspect, such as: medium-approach slow or medium-approach medium.  The left marker signifies medium speed, the right marker slow, and the middle marker is unspecified (the rule just says "then proceed".




Flashing Aspects

 CSX employs three flashing aspects, rules C-281B, approach limited; C-281C, limited clear; and C-287, slow clear.  The first two had flashing markers, 287 used a flashing green aspect without any markers.  It's interesting to note, if you look at the old (B&O) versus the new (CSX) rulebooks, that the B&O did not employ flashing aspects. 

 CSX also slipped a new aspect in the books with the flashing green of rule C-287 (slow clear).  The solid green aspect that was formerly rule C-287, slow-approach slow, is now rule C-287A.

Using Triangle Signs

The two rules above, C281B (approach limited) and C281C (limited clear), could employ one of two methods to indicate the aspect.  One option is to use a flashing marker (without the yellow triangle), and the other is to use a steady marker, with a yellow triangle sign.


Rule 281B was previously rule C-282 under the B&O, and what is now 282, was 282A.  It's all very confusing!



















This Drawing shows the major components of a full size B&O CPL signal.  As seen in the photos above, if left and/or right marker lamps are used, there are also two pieces of angle iron used to stabilize each marker, going from the marker to the pole, in addition to the cross pieces shown above.  A single 5" pole is used up to a height of 20 feet, above that, the pole starts out as a 6" pole at the bottom, and then reduces to 5".  Refer to the US&S drawings on another page.

John Engleman formerly worked for the B&O as an engineer (also for the Pennsy for a while prior to that, and was qualified on both).  His inputs have been invaluable in navigating thru some of the signal "urban legends" (and has some good stories to boot!).

Graphics and Pictures by Todd Sestero

the Aspects

Click Here for this in PDF format

Catalog Drawings

the CPL pages from a 1935 US&S catalog.

Other CPL and CPL related Info Pages

Good CPL info by A A Krug

Additional signal info by A A Krug

Good CPL signal info by Eric

Good CPL signal info by Mike

Good stuff on the B&O way out Western Maryland way by Markolf Gudjons

B&O Color Position Light Signal




Drawings for model railroaders by Michael Watnoski

Main Head Variations
Marker Lamp Variations
Mounting Variations
Dwarf CPL’s

Main Head Variations

 The pictures below show variations in the indications the main CPL head can display.



Marker Variations

First up - CPL signals with no marker lamps... usually reserved for signals with just a stop and/or restricting indications.  On the left is a restricting only signal in Westport/South Baltimore, and on the right, at Washington Blvd in West Baltimore.  The building in the left picture was torn down ~2005.  The CPL's themselves were replaced in 2012 with colorlight signals as part of an upgrade to Carroll Interlocking in Baltimore MD.



CPL signal with only one marker,  giving us the highest speed available when the marker lamp is lit.


Two marker lamps.... Left is south of Bush St, right is at Ridgely St, Baltimore.  As of November 2013, new colorlight signals are being erected.


Three markers above, the left of two signals shown on the bracket post below.  This signal was replaced with colorlights in 2012.


Four markers on a signal bridge in Baltimore, slightly west of Baileys wye at Ridgely St for NB traffic.... In the middle is one at the Dorsey MARC station for SB traffic to DC showing approach (replaced with colorlights in early 2012), and finally on the right, a CPL on the north point of Baileys Wye for SB traffic to DC displaying a medium clear.


Five marker lamps.... almost full....  The one on the left is south of Bush St. in Baltimore for NB trains, the one on the right is almost directly across the mainline at the same location for SB trains.  All of these signals at Carrolls Interlocking are now gone.


A three marker CPL and a six marker CPL share this bracket post installation south of Bush St in Baltimore for NB traffic,

In the right photo, which is about a quarter mile north of the signal on the left, and a few hundred feet south of Bush St, is a "brand new" full CPL.

We thank CSX, for the time being, in not upgrading this interlocking to colorlight signals..... get em while you can folks!!!


Mounting Variations

 CPL signals can be mounted in a variety of ways.  They can be mast, or pole mounted, they can be mounted on signal bridges, and they can be mounted on bracket posts.  Unlike Pennsy PL signals, I have yet to see a CPL signal mounted on top of a relay or equipment case.

A typical B&O signal bridge, located off of Bailey's Wye to the south, in Baltimore.

CPL signals on a cantilever bridge.  The two on the left are at the south end of Winans yard in Baltimore, and were replaced by colorlights ~2009.  The right two photos are courtesy Eric Davis.

On the left is a traditional B&O mast mounted signal, on the right is one mounted on a newer aluminum mast.

Typical bracket post installation at the south end of Winans yard / Baltimore.

Dwarf CPL Variations

Dwarf CPL signals are normally mounted at ground level, or close to ground level.  There are a few exceptions, the most notable one is probably the use of dwarf signals in the northern approach to Union Station in Washington DC, where they decided to replace the semaphores that used to be in service there with the B&O dwarfs.  One other example is an experiment the B&O tried back in the early 60's, where they mounted dwarf signals on top of 10 foot mast for controlling trains by remote control - pictures below.

Here is a dwarf signal mounted to a steel plate which is secured to the bolts at the base of the mast.  It saves installing a separate base for the dwarf.  The B&O used this in most locations where signals were placed at the end of a siding.  Also notice the doll post, telling the engineer the high signal controls the track to left, the doll post is a place holder for the siding.

A three aspect dwarf in South Baltimore.

A three aspect dwarf at Bailey's Wye in Baltimore, with one marker lamp.

A two aspect dwarf in Brunswick MD.

A full four aspect dwarf with two upper markers, also in Brunswick MD.

A full dwarf with all six markers at the Brunswick MD Railroad Museum.

Below are pictures of another example of using dwarf CPL's, this time for a non-standard use.  Back in the early 60's, the B&O tried to implement radio control of the signals on a manual block section after a fatal accident occurred.  They put dwarf CPL's up on the top of 10 or 12 foot tall poles, and re-lensed the signal so all of the aspects were yellow, like the Pennsy PL's are all single colored white.  If you have the July 2004 issue of Trains, you can look for the story by Harold E. Meeker starting on page 50.  Photos are used with the kind permission of Mr. Meeker, who is a most interesting fellow to talk to and has a rich railroad history and background, and if you are into coincidences, he lived about 5 miles away from me when we first moved into the Towson area of Baltimore back in 1966 while he was working for the B&O!!  If you go looking for these signals, forget it, as they were removed shortly after the experiment ended.  A bonus photo he sent me, and not in the article, is the one to the right of the equipment used in the test, an application using what we call today "COTS", or, Commercial Off The Shelf.



Gaithersburg MD
Baltimore MD - Westport
Baltimore MD - Under I95
Baltimore MD - Ridgely St
Baltimore MD - Below Bush St 1
Baltimore MD - Below Bush St 2
Baltimore MD - Washington Blvd

If you are out and about chasing CPL signals, here are a few of my guides for areas that contain CPL's:
     Baltimore MD
     Deshler OH
     Fostoria OH
     Perryville MD
     Washington DC's Union Station
     CPL Signals north of Baltimore



These pictures are courtesy Daniel Dawdy, and are from the Yahoo Railway Signaling group's file section.  To see more, you'll need to join.  Daniel also has a website and designs WebPages.

Gaithersburg MD


A pair of back-to-back CPL's in Gaithersburg MD on the CSX mainline heading west to Brunswick, adjacent to the fairgrounds.  The "G" and "D" signs are for eastbound traffic, such as the pictured freight.  The "G" sign is for "grade", as the freight is starting a downgrade from this point.  The signals are dark in the train picture, because the signals are approach lit, and there is nothing in that block yet to light them up.... They will light up once the train has passed the signals and entered that block.  The "D" stands for "delayed in block".  For an explanation of the "D" signs and why they weren't used until 1996/7, see:
http://www.ntsb.gov/publictn/1997/RAR9702.pdf   Check out pages 38, 43, and 53.  These signals were replaced by colorlights sometime in 2012.
Thanks to Dave M. of the Yahoo Railway Signaling Group for the info on the "D" sign and the link to this publication.

Westport / South Baltimore MD



A single aspect, restrict only CPL adjacent to the Westport Light Rail station in south Baltimore.



          The signal head & approach sign.



 The 3 signals below and Bailey's Wye are shown on this B&O map of the central Baltimore MD area.

South Baltimore MD - Under I95

An almost full CPL
The right signal has all 6 markers... the only aspect it is missing is restricting.



 This GE just passed the restrict only signal above, about a half mile ago.
Located in south Baltimore along the mainline to DC at "Carrolls" - can be seen from NB I95 - Pix from 28AUG2005
Replaced by colorlights in 2012.

South Baltimore MD - Ridgely St

A 3 CPL signal bridge - located just south of Baileys Wye

Signal head close-ups.
These heads are the same as the one I have in my backyard.  These things are built to last, as the background is 1/8" thick.  Notice that they are mounted on a slight angle, for the approach to the bridge is on a curve.

               Marker lamp close-ups.

         Signal bridge details.


This signal is located just south of Camden and Bailey's Wye - It's for northbound traffic.

For the time being, these CPL's, and others on the south side of the Howard St tunnel have escaped the "Darth Vader" signal upgrade project.  It's not known how much longer these will be around, so if you like 'em, go out and get your pix now!

It appears (so far) that most of the signals on the mainline between Baltimore and DC are intact, however, two new signal bridges went up in St. Denis/Relay last year, and the signals were cut over towards the end of 2007.  CSX was very quick in taking down the two old B&O signals bridges on either side of HX tower.  As of November 2013, these signals are in the process of being replaced, the changeover is expected to be in early 2014.

South Baltimore MD - Below Bush St 1






A CPL signal with 5 markers - for NB reverse traffic on the main line to DC in south Baltimore - 28AUG2005









South Baltimore MD - Below Bush St 2

A couple of old CPL's placed on a new cantilever bridge, just north of the signal above.  Picture taken in 2005.

This signal is also the same as the one at the top of the page.  Sometime in the 2008-2009 timeframe, due to changes CSX made in the interlocking, they changed the left signal and made it a FULL CPL, the only when we are aware of.


South Baltimore MD - Washington Blvd

Two aspect CPL by Washington Blvd and Monroe St, in south Baltimore


This signal is located just off the Baltimore-Washington DC main line at Carrolls, it sits across from the old Montgomery Wards warehouse at Monroe and Washington Blvd.  There was once two tracks thru here, and each track had a high signal for the main traffic direction and a dwarf CPL for reverse traffic.  When they took out the second track, the CPL's went with it.

This signal is unique in Baltimore, in that it has a pole mounted switch to cancel the crossing gates in the event the train was going to sit at the crossing for any amount of time.  There are two other switches at this location, however, this is the only one mounted on a signal pole.  Pix from 11MAR2006.

  Map of the Bailey's Wye area

For a more detailed maps of the Baileys Wye area, click HERE.


   CPL on the SW leg of Bailey's Wye in dntn Baltimore, for freights coming out of Riverside Yard.

     A couple of shots of signals on the south side of the Harpers Ferry tunnel.


CPL's a plenty at the west (south) end of Mt. Winans yard in south Baltimore MD, with an approaching westbound CSX freight, taken around 1995. 

Most of these signals were replaced by "Darth Vader" color light signals in 2007.  CPL's around the curve in Landsdowne were replaced a year or so earlier.  The freight is getting ready to cross Gable Ave, a fairly good photo spot off of Washington Blvd, near Patapsco (I wouldn't venture into the yard, tho).  This freight might have come from Curtiss Bay if it took the crossover just off the right side of the pix, if not, it took the long way around coming from Baltimore going thru Mt. Clare yard A.  For a B&O map of the area, click HERE (same as the map above).  The map is dated 1988, but does not have the signal bridge by Ridgely St on it.  Curious.  There is a little arrow on the map along Patapsco Ave that shows where the picture was taken from.  The map covers from Lansdowne Rd on the south side to Camden Station (before it's current 2 track configuration). 





This picture was taken from Gable Avenue, looking towards the place I took the above picture from. 





At the bottom, you can see a CPL dwarf.  At the top of the photo, and the two bright dots in the middle, are high CPL's.  The two large white dots are streetlamps on the bridge that I took the other photo from, and finally, the cluster of three lights is a freight waiting to go into Curtis Bay, sitting under the bridge.



I love trains, and I love signals.  I am not an expert.  My webpages reflect what I find on the topic of the page.  This is something I have fun with while trying to help others.  My webpages are an attempt at putting everything I can find of the subject in one convenient place.  There are plenty of other good websites to help me in this effort, and they are listed in my links section on my indexa page, or as needed on individual pages.  Please do not write to me about something that may be incorrect, and then hound the heck out of me if I do not respond to you in the manner you would like.  I operate on the "Golden Rule Principle", and if you are not familiar with it, please acquaint yourself with how to treat people by reading Mathew 7:12 (among others, the principle exists in almost every religion).  If you contact me (like some do, hi Paul) and try to make it a "non-fun" thing and start with the name calling, your name will go into my spambox list! :-)

If this is a railfan page, every effort has been made to make sure that the information contained on this map and in this railfan guide is correct.  Once in a while, an error may creep in, especially if restaurants or gas stations open, close, or change names.  Most of my maps are a result of personal observation after visiting these locations.  I have always felt that a picture is worth a thousand words", and I feel annotated maps such as the ones I work up do the same justice for the railfan over a simple text description of the area.  Since the main focus of my website is railroad signals, the railfan guides are oriented towards the signal fan being able to locate them.  Since most of us railheads don't have just trains as a hobby, I have also tried to point out where other interesting sites of the area are.... things like fire stations, neat bridges, or other significant historical or geographical feature.  While some may feel they shouldn't be included, these other things tend to make MY trips a lot more interesting.... stuff like where the C&O Canal has a bridge going over a river (the Monocacy Aqueduct) between Point of Rocks and Gaithersburg MD, it's way cool to realize this bridge to support a water "road" over a river was built in the 1830's!!!   Beware: If used as a source, ANYTHING from Wikipedia must be treated as being possibly being inaccurate, wrong, or not true.

My philosophy: Pictures and maps are worth a thousand words, especially for railfanning.  Text descriptions only get you so far, especially if you get lost or disoriented.  Take along good maps.... a GPS is OK to get somewhere, but maps are still better if you get lost!  I belong to AAA, which allows you to get local maps for free when you visit the local branches.  ADC puts out a nice series of county maps for the Washington DC area, but their state maps do not have the railroads on them.  If you can find em, I like the National Geographic map book of the U.S..... good, clear, and concise graphics, and they do a really good job of showing you where tourist type attractions are, although they too lack the railroads.  Other notes about specific areas will show up on that page if known.

Pictures and additional information is always needed if anyone feels inclined to take 'em, send 'em, and share 'em, or if you have something to add or correct.... credit is always given! BE NICE!!! Contact info is here

Beware: If used as a source, ANYTHING from Wikipedia must be treated as being possibly being inaccurate, wrong, or not true.


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New 10-6-2006
Last Modified: 02-Oct-2015