Operating Rulebooks

This page contains information on the various common operating rulebooks in Canada, Mexico, and the US, in order to help complete the workrules=* tag. This data is very much a work in progress.

Definitive OpenRailwayMap (ORM) tagging conventions are found at OpenRailwayMap/Tagging. For general guidance on tagging specific to North American railroads, see OpenRailwayMap/Tagging in North America. For general information on the US railway mapping effort, see United States/Railroads, which contains some information also useful in Canada and Mexico.

NORAC

The Northeast Operating Rules Advisory Committee is both a rulebook and the organization that defines said rulebook. NORAC was formed in 1985 to create a common rulebook for the Northeast; operations became more complicated after the creation of Amtrak and Conrail, and after state and municipal agencies took over commuter rail operation and ownership. As such, NORAC has more ways to represent the same signal rule than any other set of operating rules in the United States. NORAC is a speed signalling system, and has the most speed signalling than any other rulebook. Those using NORAC have to use the rulebook in its entirety, with no additional rules.

workrules=US:NORAC

Member Railroads

Defined Terms

Signal System Types

<todo>

Speeds

Operating Rules

Signalling Rules

Keyvalues are defined US-NORAC:<rule>, where the value of <rule> is defined in the table below.

Rule	Name	Description	Notes	Signal Aspects	Pedestal/Dwarf Signal Aspects	Semaphore Aspects
280a	Clear to Next Interlocking	Trains without operative cab signals must proceed on fixed signal indication, not exceeding 79 MPH, approaching next home signal prepared to stop.
280b	Approach Normal	Trains without operative cab signals must proceed on fixed signal indication not exceeding 79 MPH.
281	Clear	Proceed not exceeding Normal Speed.
281a	Cab Speed	Proceed in accordance with cab signal indication. Reduce speed to not exceeding 60 MPH if Cab Speed cab signal is displayed without a signal speed, or if cab signals are not operative.
281b	Approach Limited	Proceed approaching the next signal at Limited Speed.	Yellow triangle marker is a fixed signal.
281c	Limited Clear	Proceed at Limited Speed until entire train clears all interlocking or spring switches, then proceed at Normal Speed.	Yellow triangle marker is a fixed signal.
282	Approach Medium	Proceed approaching the next signal at Medium Speed.
282a	Advance Approach	Proceed prepared to stop at the second signal. Trains exceeding Limited Speed must begin reduction to Limited Speed as soon as engine passes the Advance Approach signal.
283	Medium Clear	Proceed at Medium Speed until entire train clears all interlocking or spring switches, then proceed at Normal Speed. In CSS territory with fixed automatic block signals, trains not equipped with operative cab signals must approach the next signal at Medium Speed.
283a	Medium Approach Medium	Proceed at Medium Speed until entire train clears all interlocking or spring switches, then approach the next signal at Medium Speed. Trains exceeding Medium Speed must begin reduction to Medium Speed as soon as the Medium Approach Medium signal is clearly visible.
284	Approach Slow	Proceed approaching the next signal at Slow Speed. Trains exceeding Medium Speed must begin reduction to Medium Speed as soon as engine passes the Approach Slow signal.
285	Approach	Proceed prepared to stop at the next signal. Trains exceeding Medium Speed must begin reduction to Medium Speed as soon as the engine passes the Approach signal.
286	Medium Approach	Proceed prepared to stop at the next signal. Trains exceeding Medium Speed must begin reduction to Medium Speed as soon as the Medium Approach Signal is clearly visible.
287	Slow Clear	Proceed at Slow Speed until entire train clears all interlocking or spring switches, then proceed at Normal Speed. In CSS territory with fixed signals, trains not equipped with operative cab signals must approach the next signal at Medium Speed once they have left interlocking limits.
288	Slow Approach	Proceed prepared to stop at the next signal. Slow Speed applies until entire train clears all interlocking or spring switches, then Medium Speed applies.
290	Restricting	Proceed at Restricted Speed until the entire train has cleared all interlocking and spring switches (if signal is an interlocking or CP Signal) and the leading wheels have passed a more favorable fixed signal or entered non-signalled DCS territory. In CSS territory, trains with operative cab signals must not increase speed until the train has run one train length or 500 feet (whichever distance is greater), past a location where a more favorable cab signal was received.	fixme
291	Stop and Proceed	Stop, then proceed at Restricted Speed until the entire train has cleared all interlocking and spring switches (if signal is an interlocking or CP signal) and the leading wheels have passed a more favorable fixed signal, or entered non-signalled DCS territory. In CSS territory, trains with operative cab signals must not increase their speed until they have run one train length or 500 feet (whichever distance is greater) past a location where a more favorable cab signal was received. Where a letter G (grade marker) or a letter R (restricting marker) is displayed in addition to a number plate as part of these aspects, freight trains may observe the signal as though Restricting, Rule 290, were displayed.
292	Stop Signal	Stop.
293	Switch Closed Signal	Proceed.
293a	Switch Open Signal	Proceed prepared to stop short of open switches.
293b	Approach Clear	Proceed.	Does not convey block or track information.
293c	Approach Restricting	Proceed prepared to stop at the next signal. Trains exceeding Medium Speed must begin reduction to Medium Speed as soon as the engine passes the Approach Restricting signal.	Does not convey block or track information.
294	Clear Slide Detector Signal	Proceed; slide detector not actuated.
294a	Slide Detector	Approach actuated slide detector prepared to stop short of obstruction.
296	Approach Permanent Speed Limit Sign	Proceed prepared to operate at posted speed through permanent speed restriction.	In electrified territory, this sign will be mounted in the catenary system; in non-electrified territory, this sign will be mounted on an overhead bridge or pole approximately 12 feet above the top of the rail.
296a	Approach Speed Limit Sign	Approach the Speed Limit Sign at a speed not exceeding the speed posted on the Approach Speed Limit Sign. Where a sign with two sets of numerals is posted, the higher speed applies to passenger trains, and the lower speed applies to freight trains.
296b	Speed Limit Sign	Proceed at speed posted on the Approach Speed Limit Sign until the entire train has cleared the Resume Speed Sign.
296c	Resume Speed Sign	Resume speed after the entire train has passed the Resume Speed Sign.
296d	Diverging Approach Speed Limit Sign	If routed to affected track, approach the Speed Limit Sign not exceeding the speed on the Diverging Approach Speed Limit Sign.
297	Approach Sign	Proceed prepared to stop at the Stop Sign. Trains exceeding Medium Speed must begin reduction to Medium Speed as soon as the engine passes the Approach Sign.
297a	Stop Sign	Stop, unless permission is received as prescribed by Rule 135.	fixme
297b	Working Limits Speed Limit Sign	Proceed not exceeding 30 MPH until passing a Working Limits Resume Speed Sign, unless otherwise instructed by the employee in charge.	fixme
297c	Working Limits Resume Speed Sign	Resume speed after the entire train has passed the Working Limits Resume Speed Sign.
297d	Diverging Approach Sign	If routed to affected track, proceed prepared to stop at the Stop Sign. Trains exceeding must begin reduction to Medium Speed as soon as the engine passes the Diverging Approach Sign.
298	Distant Signal Marker	Visual reminder to push-pull trains that Rule 504(b) applies in the block governed by this signal.	Located on or near the mast of distant signals in territory where push-pull trains operate, cab signals are not in service, and the maximum speed of trains exceeds 30 MPH.
298a	Delayed in Block Sign	Visual reminder to push-pull trains that Rule 504(b) applies to station stops made at this station.	Located at or near the end of passenger stations in blocks between distant signals and home signals in territory where push-pull trains operate, cab signals are not in service, and the maximum speed of trains exceeds 30 MPH.

GCOR

The General Code of Operating Rules (GCOR) is a set of operating rules for railroads in the United States. The GCOR is used by Class I railroads west of the Chicago, most of the Class II railroads, and many Short-line railroads. The current version is the 7th Edition in effective April 1st, 2015.

workrules=US:GCOR

Member Railroads

<membership table under construction>

CROR

The Canadian Rail Operating Rules (CROR) is a set of operating rules for railroads in Canada. The CROR is used by every Canadian railway. The current version is the one dated 9 May2022.

The CROR only dictates what light signals should look like, and leaves the track-side signs up to the individual operators. The signs are similar across the different operators

workrules=CA:CROR

Defined Terms

Speeds

Signalling Rules

Keyvalues are defined CA-CROR:<rule>, where the value of <rule> is defined in the table below.

Rule	Name	Description	Notes	Signal Aspects	Pedestal/Dwarf Signal Aspects
405	Clear Signal	Proceed
406	Clear to Limited	Proceed, approaching next signal at LIMITED speed
407	Clear to Medium	Proceed, approaching next signal at MEDIUM speed
408	Clear to Diverging	Proceed, approaching next signal at DIVERGING speed. (DV plaque required)
409	Clear to Slow	Proceed, approaching next signal at SLOW speed.
410	Clear to Restricting	Proceed, next signal is displaying Restricting Signal.			N/A
411	Clear to Stop	Proceed, preparing to stop at next signal.			N/A
412	Advance Clear to Limited	Proceed, approaching second signal at LIMITED speed.			N/A
413	Advance Clear to Medium	Proceed, approaching second signal at MEDIUM speed			N/A
414	Advance Clear to Slow	Proceed, approaching second signal at SLOW speed.			N/A
414A	Advance Clear to Diverging	Proceed, approaching second signal at DIVERGING speed.			N/A
415	Advance Clear to Stop	Proceed, next signal is displaying Clear to Stop, be prepared to stop at second signal.			N/A
416	Limited to Clear	Proceed, LIMITED speed passing signal and through turnouts.			N/A
417	Limited to Limited	Proceed, LIMITED speed passing signal and through turnouts, approaching next signal at LIMITED speed.			N/A
418	Limited to Medium	Proceed, LIMITED speed passing signal and through turnouts, approaching next signal at MEDIUM speed.			N/A
419	Limited to Slow	Proceed, LIMITED speed passing signal and through turnouts, approaching next signal at SLOW speed.
419A	Limited to Diverging	Proceed, LIMITED speed passing signal and through turnouts, approaching next signal at DIVERGING speed.
420	Limited to Restricting	Proceed, LIMITED speed passing signal and through turnouts, next signal is displaying Restricting Signal.
421	Limited to Stop	Proceed, LIMITED speed passing signal and through turnouts, preparing to stop at next signal.
422	Medium to Clear	Proceed, MEDIUM speed passing signal and through turnouts.
423	Medium to Limited	Proceed, MEDIUM speed passing signal and through turnouts, approaching next signal at LIMITED speed.
424	Medium to Medium	Proceed, MEDIUM speed passing signal and through turnouts, approaching next signal at MEDIUM speed.			N/A
425	Medium to Slow	Proceed, MEDIUM speed passing signal and through turnouts, approaching next signal at SLOW speed.
425A	Medium to Diverging	Proceed, MEDIUM speed passing signal and through turnouts, approaching next signal at DIVERGING speed. (DV plaque required)
426	Medium to Restrictinig	Proceed, MEDIUM speed passing signal and through turnouts, next signal is displaying Restricting Signal.
427	Medium to Stop	Proceed, MEDIUM speed passing signal and through turnouts, preparing to stop at next signal
428	Diverging to Clear	Proceed, DIVERGING speed passing signal and through turnouts. (DV plaque required)
429	Diverging to Stop	Proceed, DIVERGING speed passing signal and through turnouts preparing to stop at next signal. (DV plaque required)
430	Diverging	Proceed at REDUCED speed, not exceeding DIVERGING speed passing signal and through turnouts. (DV plaque required)
431	Slow to Clear	Proceed, SLOW speed passing signal and through turnouts.
432	Slow to Limited	Proceed, SLOW speed passing signal and through turnouts, approaching next signal at LIMITED speed
432A	Diverging to Limited	Proceed, DIVERGING speed passing signal and through turnouts, approaching next signal at LIMITED speed. (DV plaque required)			N/A
433	Slow to Medium	Proceed, SLOW speed passing signal and through turnouts, approaching next signal at MEDIUM speed.			N/A
433A	Diverging to Medium	Proceed, DIVERGING speed passing signal and through turnouts, approaching next signal at MEDIUM speed. (DV plaque required)			N/A
434	Slow to Slow	Proceed, SLOW speed passing signal and through turnouts, approaching next signal at SLOW speed.			N/A
434A	Diverging to Diverging	Proceed, DIVERGING speed passing signal and through turnouts, approaching next signal at DIVERGING speed. (DV plaque required)			N/A
435	Slow to Stop	Proceed, SLOW speed passing signal and through turnouts, preparing to stop at next signal.
436	Restricting Signal	Proceed at RESTRICTED speed.
437	Stop and Proceed Signal	Stop, then proceed at RESTRICTED speed.			N/A
438	Take/Leave Siding Signal		Indications will be specified in the Special Instructions for each specific application of this signal.
439	Stop Signal	Stop. (“A” plaque required, as shown) OPTIONAL PER RAILROAD: Unless required to clear a switch, crossing, controlled location, or spotting passenger equipment on station platforms, a train or engine not authorized by Rule 564 must stop at least 300 feet in advance of the STOP signal
440	Direction Indicator	Flashing arrow indicators attached to block signals when illuminated, identify that the route at the next controlled location is displaying a permissive signal and the route is lined and secured as indicated by the direction of the arrow.			N/A

Trackside signs

Rule	Name	Description	Image
	Whistle post	Located at least one-quarter (¼) mile from the edge of all public crossings at grade, blind curves and tunnels
	Prohibited Whistle Post	Located at least one-quarter (¼) mile from the edge of every public crossing at grade, where engine whistle signal Rule 14 (l) is prohibited by special instruction. Sound whistle only in emergencies.
	Main Track Ends	Located at the actual point where main track ends.
	Permissible Speed sign	Marks the beginning of a speed zone specified in special instructions. When one speed is shown on the sign, it applies to all trains and engines. When two speeds are shown on the sign, the higher speed applies to passenger trains and the lower speed to other trains and engines. If the new speed zone is faster than the current speed zone, the movement must clear the current speed zone before speeding up