Honda Civic 2021 Owner's Manual page 475

uuHonda Sensing®uAdaptive Cruise Control (ACC) with Low Speed Follow
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 Low
Speed Follow interval setting.
474
When the Set Speed is:
50 mph (80 km/h) 65 mph (104 km/h)
81.0 feet
24.7 meters
1.1 sec
112.2 feet
34.2 meters
1.5 sec
153.5 feet
46.8 meters
2.1 sec
208.3 feet
63.5 meters
2.9 sec
103.3 feet
31.5 meters
1.1 sec
142.4 feet
43.4 meters
1.5 sec
199.4 feet
60.8 meters
2.1 sec
273.6 feet
83.4 meters
2.9 sec