Sign Categories at a Glance

Sri Lankan road signs are grouped into three broad categories, each with a distinctive shape and colour system that allows drivers to identify sign intent at a glance — even before reading the text.

Danger Warning Signs

Danger warning signs (DWS) alert drivers to a potential hazard ahead. They are triangular with a red border and white or yellow background. The warning symbol is rendered in black inside the triangle. These signs are placed sufficiently in advance of the hazard to allow drivers time to react.

Prohibitory Signs

Prohibitory signs forbid specific driving actions at the location where they are placed. They are circular with a red border on a white background. Violating a prohibitory sign is a traffic offence under the Motor Traffic Act.

Restrictive Signs

Restrictive signs set limits — on speed, vehicle dimensions, or weight — that apply from the point of the sign until explicitly lifted by a corresponding "end of restriction" sign. Like prohibitory signs, they use a circular form with a red border.

Mandatory Signs

Mandatory signs require drivers to carry out a specific action. They are circular with a blue background and white symbol — the inverse of prohibitory signs. Failure to comply is a traffic offence.

Priority Signs

Priority signs establish right-of-way at intersections, junctions, and narrow roads. These are among the most safety-critical signs you will encounter in Sri Lanka.

Informatory & Directional Signs

Informatory signs provide directional guidance, distance information, and service locations. They are rectangular — green for highways and destinations, blue for services and facilities, and brown for tourist attractions.

Expressway Signs

Sri Lanka's expressway network — including the Southern Expressway (E01), Central Expressway (E03), and Colombo–Katunayake Expressway (E03) — uses a distinct green-and-white sign system modelled on European motorway signage. Speed limits and rules differ from regular roads.

Practical Driving Tips for Foreign Visitors

Drive on the left. Sri Lanka inherited the left-hand traffic system from the British colonial period. Steering wheels are on the right side of the vehicle. If you are arriving from a right-hand-traffic country, take a few minutes in a quiet area before joining main roads.

IDP requirement. Foreign visitors must carry a valid International Driving Permit (IDP) along with their home country driving licence. The IDP must be obtained in your home country before travel — it is not issued in Sri Lanka. Present both documents together if stopped by traffic police.

Speed awareness. Speed limits are enforced by traffic police and, on expressways, by camera systems. The most common limits are 50 km/h in towns, 70 km/h on national highways, and 100 km/h on expressways. Limits drop to 30 km/h in active school zones.

Pedestrians and animals. Expect pedestrians, cyclists, and animals — including elephants near national parks — to share the road without warning. Drive defensively and reduce speed whenever visibility is limited.

Night driving. Road conditions can deteriorate significantly after dark, particularly on rural roads. Potholes, unlit vehicles, and pedestrians in dark clothing are common hazards. Where possible, complete your driving before dusk.

Fuel. Petrol (92, 95 octane) and diesel are available at Ceypetco and Lanka IOC stations throughout the country. Fuel availability is reliable on main roads but can be limited in remote areas — fill up when the opportunity arises.