One way sign on Indian roads: which way the arrows let you drive

What is a one way sign?

A one way sign is a round regulatory board that turns a street into a single-direction route. The Indian Roads Congress code IRC:67-2012 lists it as clause 14.7.18, inside the prohibitory group of mandatory signs. It is one of the many road signs explained in our Vahan and road transport guide, and it carries the force of law.

Why it counts as an order

Round signs in India give instructions. Section 119 of the Motor Vehicles Act requires every driver to obey mandatory signs, so the board is not advice you can weigh against traffic conditions. Treat it the way you would a red light.

Who has to follow it

Every vehicle facing the board is covered: cars, trucks, buses, autos, two-wheelers and cycles. Exceptions exist only where an extra plate or a marked lane, such as a contra-flow bus lane, says so.

One way traffic sign meaning in plain words

The one way traffic sign meaning is simple: past this point everyone moves the same way. You are allowed in, but only in the direction the open arrow points. Nobody is permitted to come towards you on that carriageway, so the street works like one wide lane.

The open arrow is your route

The upward black arrow on the left of the disc is the movement that is allowed. Line your vehicle up with it and you are driving legally.

The struck arrow is the banned flow

The downward arrow on the right has a red diagonal bar through it. That bar is the prohibition: travel in that direction along the street is not allowed for anyone.

What does the one way traffic sign look like under IRC:67?

In the IRC:67-2012 plate the one way traffic sign is a white disc with a red ring, a black up arrow, a black down arrow and a red bar set at 60 degrees across the down arrow. Figure 14.20 draws it at 750 mm, with 900 mm given in brackets for faster roads.

Sizes by road speed

Like other round mandatory signs, its diameter grows with the design speed of the road. The general sizes from Table 14.4 are below.

Other versions you may see

Wikipedia’s list based on the newer IRC-67 (2022) guidelines shows separate left and right “one-way traffic” variants. We could not check that artwork, so if a board looks unfamiliar, follow its arrow and confirm the design on the Indian Roads Congress site.

Where is a one way sign put up?

The code asks for a one way sign at the entry of the street and again at every intermediate intersection along it. A driver turning in from any side road should therefore meet a board before committing to the turn, not after.

At junctions without signals

At an unsignalised junction the boards go on the near left and far right corners, facing traffic that is entering or crossing the one-way street. Two boards mean both turning streams see one.

At junctions with signals

Where lights operate, the sign may sit near the signal faces, on the signal pole, on the mast arm or on the span wire holding the lights. That keeps it in the same line of sight as the signal.

One side only on some roads

Mandatory signs normally go on both sides of a dual carriageway. Clause 14.3 allows a single board, angled towards the driver, where traffic turns out of a one-way road into another road.

What must you do on a road designated as one way?

On a road designated as one way, drive only in the posted direction from entry to exit, and leave it at a junction or the far end. The Rules of the Road Regulations 1989, regulation 17, said a driver must not drive on a one-way road except in the direction shown by the sign boards.

Use the full width carefully

With no oncoming stream, drivers sometimes drift across lanes. Keep to marked lanes, signal every change and expect vehicles to overtake on either side.

Watch turning traffic at both kerbs

Because side streets can join from left and right, look both ways before each junction.

Check the current regulations

The 1989 regulations were replaced by the Motor Vehicles (Driving) Regulations, 2017. The rule on one-way roads carries on in practice, but read the current text on the MoRTH site for exact wording.

Can you reverse or turn back on a road designated as one way?

No. Regulation 17 of the 1989 regulations also barred driving in reverse into a road designated one way. Turning round mid-block to go back is driving against the authorised flow, which the 2019 amendment lists as dangerous driving.

If you overshoot your destination

Drive on to the next junction, turn out and loop round the block. A detour of a few hundred metres is cheaper and safer than a wrong-way move.

How is the one way sign different from the red disc at the exit?

The one way sign greets you where entry is allowed; the solid red no entry disc faces drivers at the opposite end, where going in would mean driving the wrong way. One street, two boards, two meanings. Our guide to the no entry road sign covers that disc in detail.

Read which end you are at

If you see the arrow board, you can enter. If you see the red disc with the white bar, look for another way in, usually a parallel street.

Do not confuse it with a warning sign

A red-bordered triangle with two opposing arrows is a warning that the road ahead carries traffic both ways. That is the two way traffic sign, which often marks where a one-way stretch ends.

Which other signs back up a one way traffic sign?

A one way traffic sign rarely works alone. Turn-prohibited signs, the pass-either-side sign and contra-flow lane signs all help steer drivers into the right direction and keep them there.

Turn prohibited signs

Clause 14.7.19 says left or right turn prohibited signs are also used where one-way streets cross, to supplement the one-way signs and stop drivers turning the wrong way.

Pass either side

Clause 14.11.5 places a blue pass-either-side sign on traffic islands, usually in one-way roads, where both paths around the island lead to the same place.

What is the fine for ignoring a one way sign?

Ignoring a one way sign is driving against the authorised flow, which the Explanation to section 184 of the amended Motor Vehicles Act calls dangerous driving. The central penalty is ₹1,000 to ₹5,000 for a first offence, and up to ₹10,000 for a repeat.

State amounts can differ

States notify their own compounding amounts. An insurer’s guide to Karnataka fines, for example, puts wrong-way driving on a one-way road at ₹500. Check your state traffic police list before relying on any figure.

Checking for a camera challan

Wrong-way entries are often caught by cameras. You can search pending notices on the national e-Challan portal listed in the official links below.

Do cyclists, pedestrians and buses follow the one way sign?

Mostly yes for vehicles, no for walkers. The sign controls vehicles, including bicycles. Pedestrians may walk either way on the footpath, so drivers should expect people to step out looking the “wrong” way.

Contra-flow bus and cycle lanes

IRC:67-2012 clause 17.38 provides a contra flow bus lane sign for a marked lane where buses run against the general flow on a one-way street; clause 17.40 does the same for cycles. Only the named vehicles may use those lanes.

Emergency vehicles

If an ambulance or fire engine with its siren on appears, pull left and give way. Never tail it in the hope of getting through faster, and never follow one that is directed against the flow.

What if you enter a one way street by mistake?

Stop safely as soon as you realise, put on hazard lights and do not carry on head-on into traffic. Wait for a clear gap, then turn into the nearest side road or driveway, or ask a traffic officer to guide you out.

Note where the board was missing

If the entry board was hidden by a tree or a hoarding, note the spot. It may help if you contest a challan.

Is the one way sign asked in the learner licence test?

Yes, the learner licence test includes road-sign questions, and the one way sign is a common one. Expect to pick its meaning from options such as “no entry”, “one way” and “two-way traffic ahead”.

A quick way to remember

Round board with arrows means an order about direction. Triangle with arrows means a warning. A solid red disc means you may not enter.