Which of the following tells the actual distance of route length ?

Km distance

The correct answer is option 2: Km distance

Transport distance can be measured as:

km distance or actual distance of route length;

time distance or the time taken to travel on a particular route; and

cost distance or the expense of travelling on a route.

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.