One such material is asphalt, a substance often placed on top of buildings and used to cover road surfaces.

VOA: special.2010.03.02

You can drive your car slowly up a rough road to the top.

VOA: special.2009.07.20

Their top road points percentage before this season was .663, set in the 1976-77 (23-10-7) and 1980-81 (25-12-3) seasons.

WSJ: Grabner scores 2 in Islanders' win over Panthers

In the feature Superbike races, Irish rider Brian McCormack failed to finish race one but was 23rd in race two, in which top road racer Guy Martin was ninth.

BBC: NI riders excel at Thruxton races

The Cowgate, the Grassmarket, most of Gorgie Road, London Road and the top of Easter Road will be added to the central zone.

BBC: Princes Street