Road signs / regulatory
Maximum speed sign: meaning and response
What it means
The number is the maximum speed in kilometres per hour under ideal conditions.
On the road
This illustration uses 50. A safe speed may be lower in poor weather or traffic.
Alberta Driver’s Guide: Cars and light trucks, Spring 2026, p. 27 · Chapter 2: Traffic control
Original, simplified study illustration. Local signs and provincial rules govern its use. Source checked October 29, 2026.