mandatory sign
Motorcycle lane
Thai road sign บ.51 — Motorcycle lane. Meaning: The marked lane is reserved for motorcycles where the motorcycle-lane control applies. Learner-manual coverage: this identity is shown in the current DLT car-driver learner manual. Inclusion does not mean it appears in every theory test.
Thai name: ป้ายช่องเดินรถจักรยานยนต์
Independent English reference · Source: Department of Highways · Sign บ.51
Road response
On the road
Driver action
What should you do?
The marked lane is reserved for motorcycles where the motorcycle-lane control applies.
Exam-style scenario
Read the situation
A car driver sees this sign above a narrow lane reserved for powered two-wheelers.
Best response: Keep the car out of the narrow reserved lane and remain in a lane open to cars.
Sign comparison
Don’t confuse it
This sign
Motorcycle lane
Compare with
Bicycle lane
Key difference
The powered motorcycle pictogram reserves the lane for motorcycles; the bicycle sign shows a pedal cycle instead.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
