Railway signs explained: what Indian track boards and signals mean

What are railway signs?

Railway signs are the fixed boards, markers and signals that keep trains running safely. Most stand beside the track and speak to the loco pilot: how fast to go, when to whistle, where work is going on. A smaller set stands on roads before a level crossing and speaks to drivers and people on foot.

Two audiences, two rulebooks

Track boards and signals follow the railway’s own operating rules. Road warnings before a crossing follow the Indian Roads Congress code used for all traffic signs. The same place can carry both, which is why a crossing may have yellow railway boards on one side and red triangles on the road.

Indian railway sign boards: which boards stand beside the track?

Indian railway sign boards cover speed, caution, whistling, stopping and position. The table below lists the ones a passenger is most likely to notice from a window or a platform end.

Shunting and block limit boards

A shunting limit (S/L) board, yellow with a black cross, shows how far shunting may go. A Block Section Limit (BSL) board, with crossed diagonal stripes, marks the end of station limits.

What do speed and termination boards tell a loco pilot?

A yellow triangular speed board gives the limit in km/h, sometimes with a note such as “Rajdhani only”. The restriction lasts until a yellow circular T board. Variants such as T/P (passenger), T/G (goods), T/EMU and T/L (local) end the limit only for that class of train.

Why a board needs a partner

The speed board alone does not say how long the slow stretch is. The driver keeps the limit until the rear of the train passes the matching T board.

Speed indicators near work sites

A rectangular board with white and black bands and a km/h figure stands about 100 m before a defect or work site. It confirms the slower speed close to the spot.

Which caution and stop boards protect track work?

When engineers work on the line, a caution indicator comes first: a reflective yellow arrow board about 700 m before the speed board and 800 m before the work. The arrow points to the affected track. A red-and-white banded stop indicator, lit by two red lamps at night, means the train must stop dead.

Small round caution boards

White circular CP and CG boards show a caution for passenger and goods trains respectively. A P board warns of a vulnerable point on the track, and an E board ends that stretch.

Hill and tunnel warnings

A V board warns of possible landslides or falling rocks, common near tunnels. An R board marks a refuge point where track workers can step aside safely.

What do whistle boards like W and W/L mean?

A square yellow W board is a general whistle indicator. The W/L version means “whistle for level crossing” and is usually placed about 250 m before an unmanned crossing; its Hindi version reads “seetee bajao - phatak”. A W/B board, less common, asks for a whistle before a bridge.

The L board

A black L on a square yellow board tells the crew a level crossing is coming up, even where no whistle is needed.

What a road user should take from it

If you live near a crossing, a W/L board explains the horn you hear.

Railway signals and signs: how do colour light aspects work?

Railway signals and signs work together: boards give fixed information, while signals change with the state of the line. A colour light signal shows red for “on” (stop), one yellow for caution, two yellows for attention in four-aspect areas, and green for clear. The driver plans braking around these aspects.

Stop signals in automatic territory

Where an A marker sits below a signal, it is an automatic stop signal. After halting, a train may pass it at red, usually after 1 minute by day and 2 minutes by night, and then move with care.

Route indicators

A row of white lights at an angle, called a feather, sits above a home signal before points. It shows which line the train is being routed onto.

What do semaphore arms and signal markers mean?

On semaphore signals, the arm’s angle gives the order. In the lower-quadrant style a horizontal arm means “on” and an arm lowered about 60 degrees or more means clear. In the upper-quadrant style, horizontal is on, about 45 degrees is caution and straight up is clear. Lamps give the same aspects at night.

Markers on the post

Small plates name the signal type: P for a distant signal, G (black on yellow) for a gate signal, IB for an intermediate block signal, C for calling-on and R for a repeater.

A cross on the signal

An X on a semaphore arm, or a white X over a colour light bracket, means the signal is out of use and need not be obeyed.

What is the railway track symbol on maps and keyboards?

The railway track symbol means different things in different places. On a road, it is the warning sign for a level crossing. On a map, railway lines have their own line style, and Indian topographic sheets often separate lines by gauge, so always read the map’s legend. On phones, the railway track emoji 🛤 arrived with Unicode 7.0 in 2014.

Gauges a map may show

Indian Railways uses broad gauge (1,676 mm), metre gauge (1,000 mm) and narrow gauges of 762 mm and 610 mm. Maps that split lines by gauge reflect these widths.

Railway track sign on Indian roads: what should drivers do?

A railway track sign on a road warns that a level crossing is ahead. Slow down at the first board, stop short of the gate or rails, look and listen both ways, and cross in one go. Our guide to the railway crossing sign covers guarded and unguarded symbols in detail.

1. Slow early. Ease off as soon as the first warning board for the crossing comes into view.
2. Stop short. Halt behind the gate, barrier or stop line, well clear of the rails.
3. Look and listen. Check both directions for a train and listen for a horn before moving.
4. Cross in one go. Drive over in a low gear, without changing gear or stopping on the rails.

The legal duty at an unmanned crossing

Section 131 of the Motor Vehicles Act asks the driver to stop and have someone check for a train before crossing an unguarded crossing. See the wider traffic signs list for how this warning fits with other boards.

Fines that can follow

Rushing a crossing can be booked under general road offences. The e-challan guide explains how to check and pay any notice.

Which electric traction signs warn a loco pilot?

On electrified routes, signs on the overhead equipment (OHE) masts matter. A diamond with 500 m or 250 m marks a neutral section where power must be cut. A cross with a broken bar means open the main circuit breaker; a plain broken bar means close it again. Three bars with the middle one offset tell the driver to lower or raise the pantograph.

End of wiring

A board reading “Electric engines STOP here” marks where the overhead wire ends.

Power block boards

Black text on a white board tells the crew the wire ahead is not energised. Even so, the public should treat every overhead wire as live.

What do gradient, kilometre and curve markers show?

These small markers help crews and engineers know exactly where they are. A grade indicator slab with a number such as 500 means a slope of 1 in 500. Kilometre markers are black on white, and pole codes such as 32/4 mean the fourth mast after kilometre 32.

Curve boards

Small white boards at each end of a curve give its number, radius and superelevation, the tilt built into the track.

What do train horn codes signal?

Horn codes are sound signals, not boards, but they pair with whistle boards. One long blast is a normal departure. A very long continuous blast is used when approaching a level crossing or tunnel or running through a station. A rapid series of short blasts signals danger.

Codes for the guard

Short combinations call the guard, ask for brakes to be applied or released, or report that the train cannot move. Many older codes are no longer used.

Indian railway signs and symbols: why should people on foot heed them?

Indian railway signs and symbols are mostly for crews, but they tell walkers a lot. A W/L board means trains will not slow for the crossing, a neutral section board means live wires overhead, and a closed gate means a train is close. Crossing tracks on foot away from a bridge or crossing is unsafe and is treated as trespass.

On the platform

Stay behind the yellow line, use the foot over-bridge and never jump down to cross between platforms.

Near a level crossing

Never duck under a closed gate. Keep earphones out so you can hear the horn, and wait until the gates are fully open before stepping across.