Gusset (IMAGE) University of Maryland Caption Under the Capital Beltway, Kalantari tends his sensors from a ledge along the rim of a steep gully. Water seeps from the roadway forming small puddles, and the metallic echoes of traffic thump in the narrow spaces. Credit UMD Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.