mandatory sign
High-occupancy vehicle lane
Thai road sign บ.50 — High-occupancy vehicle lane. Meaning: The marked lane is reserved for vehicles carrying at least the number of occupants shown on the sign. 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: ป้ายช่องเดินรถมวลชน
Independent English reference · Source: Department of Highways · Sign บ.50
Road response
On the road
Driver action
What should you do?
The marked lane is reserved for vehicles carrying at least the number of occupants shown on the sign.
Exam-style scenario
Read the situation
Only the driver is in your car when the adjacent lane displays an occupancy requirement.
Best response: Do not enter the reserved lane because the driver-only car does not meet its occupancy condition.
Sign comparison
Don’t confuse it
This sign
High-occupancy vehicle lane
Compare with
High-occupancy vehicle lane information
Key difference
This mandatory sign controls entry to the reserved lane; the information sign announces the occupancy condition and lane layout.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
