Overview
Idaho's transportation system consists of more than 60,000 miles (97,000 km) of roads, 4,000 bridges, 1,887 miles (3,037 km) of rail lines, 125 public airports, and the Port of Lewiston. The transportation department has the responsibility for almost 5,000 miles (8,000 km) of highway (or nearly 12,000 lane miles), more than 1,700 bridges, and 30 airstrips. The agency is also responsible for 30 rest areas and 10 interstate ports of entry.
Read more about this topic: Idaho Transportation Department