For the city test, the cars are driven on an 11-mile, stop-and-go journey atanaveragespeedof 20 miles perhour that lasts 31 minutes and includes 23 stops.
From a research station operated by the National Science Foundation called Summit Camp, a spot where the ice sheet is about 2 miles thick, GROVER will crawl atanaveragespeedof 1.2 mph (2 kilometers perhour).