A blue circular sign sets a minimum speed of 30 mph. When may a driver travel below that minimum?
Whenever the driver prefers to conserve fuel
Only while another vehicle is overtaking
When compliance would be unsafe or impracticable✓Bonne réponse
Whenever the road has more than one lane
Explication
The minimum applies unless meeting it would be unsafe or impracticable in the circumstances. Ordinary preference for a slower pace is not an exception to a mandatory minimum-speed control.