The information contained in this report represents average freeway traffic conditions on a typical weekday in 1998.
Congestion can be either recurrent or non-recurrent.
Non-recurrent congestion is caused by incidents, maintenance work or construction activities where normal capacity is temporarily reduced, or holidays or special events where peak demands are higher than normal. Non-recurrent congestion is not included in this inventory. Thus, specific bottleneck locations are not identified in this report. In addition, traffic conditions on conventional highways, expressways, and local streets are not recorded as part of this program. Definition of Congestion Congestion is defined as a condition where the average speed drops below 35 mph for 15 minutes or more on a typical weekday.