Highly variable, but in inclement conditions at higher speeds a pro would be looking 20-30 seconds ahead a lot I think the book answer is at least ten..
You follow the vehicle ahead of you by 3 seconds, you should never plan a path where you will be unless you are switching lanes and need to know how much space you have because while driving things can change in an instant, for good defensive driving just be prepared for anything at any time, and always follow vehicles by 3 seconds from the time their rear bumper passes an object until your front bumper passes the same stationary object
It depends on how fast your reflexes are, at a velocity of 176 feet per second (1 mile per minute), if your reflex reaction time is 2 seconds you need to look at least 352 feet ahead, if your reaction time is 3 seconds, then you should be looking at least 528 feet ahead.
According to the Smith System safe driving course. You should look ahead at least 15 seconds.
a good rule of thumb, is to back off at least 1 car for every 10 miles per hour that your driving. this way, if theres a problem up ahead. you will have time to try and stop.
You should keep at least a three second distance to the car ahead.
To "aim high" means to look far ahead when you drive. We do not look at our feet when we walk, we look ahead. Aiming high allows you to be able to analyze traffic situations. In city traffic, look at least one block ahead. On highways and expressways, look as far ahead as possible, for at least 2-3 seconds.
4 to 5 seconds
10 to 15 seconds= 1 block= quarter of a mile
Drivers should always scan at least 10 to 12 seconds down the road, both left and right to look for potential hazards. It is a good practice to know the surroundings when driving to avoid potential accidents.
At least three seconds, more in adverse weather conditions.
Drive in the lane with the least amount of congestion.
Driving with headlights on during the day reduces your chance of collision by about 25% because other drivers can see you from at least 1/2 mile ahead.
A moving object can not be used a a reference point because it has no fixed position.
One car length for every 10 miles per hour of speed. If you are then traveling at 50 mph, one should allow at least 5 car lengths between you and the car in front of you.
When driving in the city you should scan the road at least by 1 to 1.5 blocks to ensure safety of everyone.
To cover the 21 miles will require at least 19 minutes and 23 seconds of driving time if you maintain a steady 65 mph. You will have to add time for stops, detours and other delays.
At least 1 hour, 46 minutes, 48 seconds at 90 miles per hour.
it is recommende to keep a gap of at least two seconds behind the car in front of you so the distance varies with the speed
It will take at least 53 minutes and 34 seconds of total driving time at a constant 112 km/h. Add time for stops and delays.
at least a block ahead