mandatory sign
Bus lane
Thai road sign บ.49 — Bus lane. Meaning: The marked lane is reserved for buses where the bus-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: ป้ายช่องเดินรถประจำทาง
Independent English reference · Source: Department of Highways · Sign บ.49
Road response
On the road
Driver action
What should you do?
The marked lane is reserved for buses where the bus-lane control applies.
Exam-style scenario
Read the situation
You are driving a private car beside a lane marked for buses under this control.
Best response: Keep the private car in a general-traffic lane rather than entering the reserved bus lane.
Sign comparison
Don’t confuse it
This sign
Bus lane
Compare with
Bus lane information
Key difference
The blue mandatory lane sign marks a bus-only control; the information board explains or identifies the lane arrangement before or beside it.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
