miles
Distances between cities should be measured in either miles or kilometers.
Kilometers
Because the distance in metres is a very long number.
Distance*speed divided by time
When driving, you should always measure your following distance in seconds. A general rule of thumb is to maintain a following distance of at least 3-4 seconds between your vehicle and the one in front of you. This distance allows you enough time to react and brake safely in case of an emergency.
There is a driving distance of 521 kilometers (324 miles) between both cities. You should take between 6 1/2 and 7 hours to travel such distances.
kilometers
It depends on how long a distance you want to measure!
You should set up a google account, then add the distance measurement tool mapplet. (search: distance measurement tool mapplet on Google) then open google maps and use the tool to measure the distance between London and Indianapolis. easy as pie
If you look at the bottom of the map, there should be a scale. Take a ruler, measure the distance for each measurement, and convert to what you need
Seconds
You should always measure your following distance by car length. This will give yourself time to break when necessary without being close to the driver ahead of you.
what should be the distance between instrument cable and electrical cable
US Highways should have a mimimum lane width of 12 feet. The actual width varies between cities, counties, and states, and often times depends on the road.