Lane Discipline and Lane Markings
Stay in your lane — changing without signalling is dangerous and illegal.
Lane markings are legally binding instructions. A solid yellow centre line means no overtaking. A broken white line permits lane changes when safe.
Penalty Under Law
₹500 under Sec. 177 MV Act for general lane violation. Sec. 184 if dangerous.
Legal Source
CMVR Rule 3; MV Act Sec. 119; IRC:67 (Road Markings Manual)
What the Law Says
CMVR Rule 3 requires vehicles to stay within marked lanes wherever lane markings exist. Crossing a solid yellow line is prohibited. Changing lanes without indicating is a violation of CMVR Rule 22 (use of signals). On multi-lane roads, slower vehicles must use the leftmost lane; faster lanes are for overtaking only.
💡 Why This Rule Exists
Lane discipline prevents the chaotic cross-weaving pattern seen on Indian urban roads that dramatically increases collision risk. Every unpredictable lane change is a potential side-impact collision. On highways, sudden lane changes without mirrors or indicators kill hundreds of motorcyclists annually who are in the blind spot of the changing vehicle.
Key Facts
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White broken centre line: lane changing permitted when safe.
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White solid centre line: no lane change but you may cross in emergencies.
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Yellow solid double line: crossing strictly prohibited — no overtaking.
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Yellow broken line: overtaking permitted when safe from your side only.
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Edge lines (white, solid): mark the boundary of the carriageway — do not cross unless turning or stopping.
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IRC:67 is the official Indian road markings manual referenced by all state traffic authorities.
⚠️ Common Violations
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Changing lanes without indicating — one of the most common offences on Indian highways.
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Straddling two lanes to keep options open.
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Using the emergency lane as a travel lane in heavy traffic.
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Crossing double yellow lines to overtake.
Frequently Asked Questions
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More Rules of the Road Rules
Always Drive on the Left Side of the Road
All vehicles in India must travel on the left side of the road. Wrong-side driving is a leading cause of head-on collision deaths.
₹500 – first offence
Rules for Overtaking (Passing) Vehicles
You may overtake only from the right, only when the road ahead is clear, and never in prohibited zones. The vehicle being overtaken must make way.
Illegal overtaking: ₹500 (Sec
Mandatory Use of Indicators and Hand Signals
Every driver must signal their intention to turn, change lanes, or stop — using indicators or prescribed hand signals. Failing to signal before a manoeuvre is a legal violation.
₹500 under Sec
Give Way to Emergency Vehicles
When an emergency vehicle is approaching with lights and siren active, every driver must immediately move aside to create a clear lane. The fine for blocking an ambulance is ₹10,000.
₹10,000 fine