Editing Traffic (section)

==Congested traffic==
[[File:Peak hour traffic in melbourne.jpg|thumb|250px|Traffic slows to a crawl on the [[Monash Freeway]] in [[Melbourne]], Australia through [[peak hour]] traffic.]]
{{main|Traffic congestion}}

In some places traffic volume is consistently, extremely large, either during periods of time referred to as ''rush hour'' or perpetually.  Exceptionally, traffic upstream of a vehicular collision or an obstruction, such as [[road works|construction]], may also be constrained, resulting in a [[traffic jam]]. Such dynamics in relation to [[traffic congestion]] is known as [[traffic flow]]. [[Traffic engineering (transportation)|Traffic engineers]] sometimes gauge the quality of traffic flow in terms of [[Level of service (transportation)|level of service]].

In measured traffic data, [[Traffic congestion: Reconstruction with Kerner's three-phase theory|common spatiotemporal empirical features of traffic congestion]] have been found that are qualitatively the same for different highways in different countries. Some of these common features distinguish the wide moving jam and synchronized flow phases of congested traffic in [[Boris Kerner|Kerner's]] [[three-phase traffic theory]].

===Rush hour===
{{main|Rush hour}}

During business days in most major cities, [[traffic congestion]] reaches great intensity at predictable times of the day due to the large number of vehicles using the road at the same time. This phenomenon is called ''[[rush hour]]'' or ''peak hour'', although the period of high traffic intensity often exceeds one hour. Since the advent of [[car radio]]s, radio programming during rush hour is likely to be called [[drive time]].