01-07-2024, 09:49 AM
Yes, you are right, According to VOLVO
One line represents about 1 second to the vehicle in front, 5 lines represents about 3 seconds.
However, "it has to be dependent of the speed. Faster the speed, longer distance between the cars is needed. " This is true regardless if it's ACC / CC or regular driving. It's the driver's responsibility to fallow the car in front with from a safe distance! The faster you go, the longer distance driver needs to keep because of simple physics rule, "The higher the velocity, the longer distance to come to a complete stop"
Having said that, the safe following distance is ( speed kmph / 2 ) in meters! Meaning if a car traveling in 100kmph the safe fallowing distance is 50 meters.
A car traveling 100kmph, goes 55.55 meters in 2 seconds. Now, since it's impossible for a human eye to measure the distance, drivers start count apx. 2 seconds 87, 88, 89 from the moment car in front passes a mark until the driver's car reaches to the same mark which makes the safe distance!
I have ACC on my Volvo and on VW, both of them operate the same way!
It does not change nor adapt following distance according to set cruising speed except in traffic (stop and go mode). It's the driver's responsibility to set the correct distance according to desired cruising speed!
if you are going 80mph (128.748kmph) which is max ACC, maximum 5 bars (3 seconds) distance is still within the safe following distance of 65 meters (Speed kmph / 2 in meters) 130kmph travels 108.3 meters in 3 seconds and ("Counting 2 seconds rule 72.2 meters) .
So, what I usually do is 3 bars in the city and full bars on the highway!
One line represents about 1 second to the vehicle in front, 5 lines represents about 3 seconds.
However, "it has to be dependent of the speed. Faster the speed, longer distance between the cars is needed. " This is true regardless if it's ACC / CC or regular driving. It's the driver's responsibility to fallow the car in front with from a safe distance! The faster you go, the longer distance driver needs to keep because of simple physics rule, "The higher the velocity, the longer distance to come to a complete stop"
Having said that, the safe following distance is ( speed kmph / 2 ) in meters! Meaning if a car traveling in 100kmph the safe fallowing distance is 50 meters.
A car traveling 100kmph, goes 55.55 meters in 2 seconds. Now, since it's impossible for a human eye to measure the distance, drivers start count apx. 2 seconds 87, 88, 89 from the moment car in front passes a mark until the driver's car reaches to the same mark which makes the safe distance!
I have ACC on my Volvo and on VW, both of them operate the same way!
It does not change nor adapt following distance according to set cruising speed except in traffic (stop and go mode). It's the driver's responsibility to set the correct distance according to desired cruising speed!
if you are going 80mph (128.748kmph) which is max ACC, maximum 5 bars (3 seconds) distance is still within the safe following distance of 65 meters (Speed kmph / 2 in meters) 130kmph travels 108.3 meters in 3 seconds and ("Counting 2 seconds rule 72.2 meters) .
So, what I usually do is 3 bars in the city and full bars on the highway!