What is the recommended safe following distance for doubles and triples on a dry road at highway speed?
a.One second for every 10 feet of vehicle length
b.At least one second for every 10 feet of vehicle length plus an additional second for the extra trailers
c.The same distance as a passenger car
d.Two vehicle lengths
Explanation
Doubles and triples require significantly more stopping distance than single vehicles. You should allow at least one second for every 10 feet of vehicle length, plus an additional second because of the extra trailers. At highway speeds, this means a very large following distance.