Â© PMA of Georgia 2010. Venting. This concept of the plumbing system breathing (while. conceptually accurate) is somewhat confusing to a. craftsperson when trying to understand specifically what. the purpose of the vent system is.
Definition of traffic jam. : a situation in which a long line of vehicles on a road have stopped moving or are moving very slowly stuck in a traffic jam.
Last year, the average American driver wasted 38 hours sitting in traffic. While the occasional traffic jam inconveniences most drivers, some unlucky people live in the nation's most congested cities. In addition to spending an average of 42 hours a year in traffic, drivers in these cities face peak hour congestion that can increase travel time during rush hour by 15% or more.