Ambient noise includes all sounds present in an environ-. ment. The ambient noise level may be measured at any mo-. ment, but it will vary widely with time, e.g., with the coming. and going of trucks and aircraft. Traffic noise is higher at. noon than at midnight and higher still during the morning. and evening rush hours.
(According to the most recent U.S. numbered highway log, published in 1989 by the American Association of State Highway and Transportation Officials, the route is 3,249 miles long). In 1963, therefore, U.S. 20 became the longest road in the country. U.S. 20 is 3,365 miles long according to the 1989 log. The route begins in Boston at a junction with Massachusetts Route 2 and ends in Newport, Oregon, at a junction with U.S. 101.
The longest interstates in the U.S. are ones that go coast-to-coast and end in zeros. Interstate 90 connects Boston to Seattle and is more than 3,000 miles long. Interstate 80, which runs from just west of New York City to San Francisco is next, and Interstates 40 (Wilmington, NC to Barstow, CA) and 10 (Jacksonville, FL to Santa Monica, CA) are also among the longest. Written Jul 22, 2015 â¢ View Upvotes.