Class 4 Practice Results - Restart New Quiz Restart New Quiz #1. The maximum speed in an alley is _______ unless otherwise posted. 30 km/h 30 km/h 20 km/h 20 km/h 15 km/h 15 km/h 25 km/h 25 km/h The maximum speed in an alley is 20 km/h unless otherwise posted. Next