Honda Civic Hatch 2017 Owner's Manual page 478

uuWhen DrivinguAdaptive Cruise Control (ACC) with Low Speed Follow (LSF)
The higher your vehicle's following-speed is, the longer the short, middle, long or
extra long following-interval becomes. See the following examples for your
reference.
Following-interval
Short
Middle
Long
Extra
Long
When your vehicle stops automatically because a vehicle detected ahead of you has
stopped, the interval between the two vehicles will vary based on the ACC with LSF
interval setting.
476
When the Set Speed is:
50 mph (80 km/h) 65 mph (104 km/h)
83 feet
25 meters
1.1 sec
111 feet
34 meters
1.5 sec
154 feet
47 meters
2.1 sec
207 feet
63 meters
2.9 sec
*
100 feet
31 meters
1.1 sec
139 feet
43 meters
1.5 sec
200 feet
61 meters
2.1 sec
272 feet
83 meters
2.9 sec