How can you check your following distance using a fixed object like a signpost?

• A.Count the seconds between the vehicle ahead passing it and your vehicle reaching it
• B.Measure the shadow between the two vehicles
• C.Count how many lane lines fit between you
• D.Estimate by looking only at your speedometer

Why

Pick a fixed object; when the vehicle ahead passes it, start counting. If you reach it in less than three seconds in normal conditions, you are following too closely.

Manual topic: California Driver Handbook - Following Distance · From the California Learner's Permit (Car) practice bank (CAC-029).

Practice the full California Learner's Permit (Car) test

More Speed Limits & Following Distance questions

• Unless a different speed is posted, what is the maximum speed on most California freeways?
• Where posted, some California freeways may allow a maximum speed of:
• Unless posted otherwise, the speed limit on a two-lane undivided highway in California is:
• Unless posted otherwise, the speed limit in a residential district is:
• Within 500 to 1,000 feet of a school, while children are outside or crossing, the speed limit is generally: