warning sign
Use low gear
Thai road sign ต.78 — Use low gear. Meaning: This yellow warning-text sign instructs drivers to use a low gear to help maintain vehicle control. Catalog status: additional official road-sign reference.
Thai name: ป้ายเตือนให้ใช้เกียร์ต่ำ
Independent English reference · Source: Department of Rural Roads · Sign ต.78
Road response
On the road
Driver action
What should you do?
This yellow warning-text sign instructs drivers to use a low gear to help maintain vehicle control.
Exam-style scenario
Read the situation
Before a long descent, this warning tells you to select a gear that helps control speed.
Best response: Select a lower gear before the descent so the vehicle remains controlled from its start.
Sign comparison
Don’t confuse it
This sign
Use low gear
Compare with
Steep descent ahead
Key difference
The text panel directly tells the driver to select a low gear; the slope pictogram warns of the steep descent that may require that response.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
