Georgia Commercial Driver License Practice Test

Lag distance refers to the distance a vehicle travels from the time the driver perceives a need to stop until the brakes are fully applied. This distance is influenced by the driver's reaction time and the speed of the vehicle. At a speed of 55 mph, the average driver's reaction time is typically estimated at about 1.5 seconds. During this time, the vehicle continues to travel. To calculate the lag distance, you can use the formula: Lag Distance = Speed (in feet per second) × Reaction Time (in seconds) First, convert the speed from miles per hour to feet per second. Since there are 5280 feet in a mile and 3600 seconds in an hour, you can convert: 55 mph = 55 × (5280 feet / 3600 seconds) = approximately 80.67 feet per second. Now, using the average reaction time of 1.5 seconds: Lag Distance = 80.67 feet/second × 1.5 seconds = approximately 121 feet. However, the options given in the question seem to be more aligned with a specific study context or standardized scenarios. At 55 mph, common values for lag distances may not use the actual distance but rather simplified figures for learning and