Metal scraping sound when driving?

Hey guys, today I was driving when I heard this loud metal scraping sound coming from the front right side of my car. At the time I was driving near a construction area and there was some debris (pebbles and such) on the road. The noise went away soon after and didn't return until about 20 minutes later after... show more Hey guys, today I was driving when I heard this loud metal scraping sound coming from the front right side of my car. At the time I was driving near a construction area and there was some debris (pebbles and such) on the road. The noise went away soon after and didn't return until about 20 minutes later after driving on the highway for about 20 minutes. However, after exiting and slowing down under 30 the noise went away. While driving I got up to about 40 mph and still didn't hear the noise. Any ideas on what this noise could be?
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