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

VOA: special.2010.03.02

Harper took his band on the road last year as part of the effort to get young people to vote.

VOA: special.2009.05.08

It stands in a grassy area along a busy road at the edge of Arlington National Cemetery, in Virginia.

VOA: special.2011.05.30

Or visitors can drive a twenty-nine kilometer long road, stopping off at different points to enjoy the colorful formations.

VOA: special.2009.04.15

When she saw Misses Smith and the children coming down the road, Misses Gray went out to meet them.

VOA: special.2009.12.12

The females make huge webs, sometimes large enough to hang between trees on either side of a rural road.

VOA: special.2009.10.30

"That's why we need strong rules of the road to guard against the kind of systemic risks we have seen.

VOA: special.2009.09.18

One way to raise the average fuel economy is to increase the number of electric cars on the road.

VOA: special.2010.11.17

I was glad to see his two friends, Tom and Joe, coming down the road as the sun began to set.

VOA: special.2009.07.04

"At noon we were stuck in a muddy road about as nearly as we could figure, ten kilometres from Udine.

VOA: special.2011.06.26

The road is about one hundred forty kilometers from Washington, on the other side of the Potomac River.

VOA: special.2009.09.21

Babe dug his feet in the ground and pulled with all his strength until the road became straight.

VOA: special.2009.01.24

The road moves back and forth and around corners as it moves up the face of the mountain.

VOA: special.2010.09.08

The road is narrow and the traffic is often slow as it travels through each of the small towns of the Keys.

VOA: special.2010.03.22