Transporting distance can't be measured in terms of _____.

The correct answer is option 2: Intensity of vehicles travelling on a route

Transport distance can be measured as:

km distance or actual distance of route length (A);

time distance or the time taken to travel on a particular route (D);

and cost distance or the expense of travelling on a route (C).

In selecting the mode of transport, distance, in terms of time or cost, is the determining factor. Isochrone lines are drawn on a map to join places equal in terms of the time taken to reach them.