Definition of "roadside"

I was rather impressed with the neat and tidy appearance of these roadside stations, many of which had their name boards painted in the blue and white colours of the Scottish Region.

1950 January, Arthur F. Beckenham, “With British Railways to the Far North”, in Railway Magazine, pages 5–6

David Cameron has said the government will "look carefully" at the use of heavily armoured vehicles after three British soldiers were killed in Afghanistan by a roadside bomb while travelling in a Mastiff troop carrier.

2013 May 1, Nicholas Watt, Nick Hopkins, The Guardian‎