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.
View Full Version : Longest street in the United States. Not a highway or interstate. Someone told me it was Broad Street in Philadelphia but I don't buy that due to City Hall interrupting Broad Street in the middle. I've heard Colfax Ave. in Denver, Figueroa in LA, and even Broadway in NY. None of these I was able to get more than an unofficial I heard such and such is the longest street in the US.