This dataset contains the traffic volume at Traffic Signal locations. It is aggregated into 15 minute time periods and the counts are assigned to each traffic loop detector (per lane) at each traffic signal site. This information is sourced from the SCATS system where a detector is a loop of wire installed into the road surface and is activated when a vehicle passes over it and sends a pulse to the traffic signal. NOTE There are limitations with this dataset whereby a maximum of 24 Volume Detectors are available per site. Internal investigations are underway to explore how this could be addressed.

A detailed listing outlining the 23 year history (1988-2010) of traffic volumes on Provincial Highways (King's, Secondary, Tertiary Roads and the 7000 series highways). The highway network is divided into approximately 1600 sections for reporting purposes. Seasonal traffic volume variations are estimated for each section. Although local conditions cause variations, the volumes shown are considered to adequately represent the section. On highways that overlap one another (e.g. Highway 35 and Highway 115) the volume information is referenced to the lower number highway. When an overlap occurs between a freeway and non-freeway, reference is made to the freeway route number. The freeways are Highway 400 to Highway 427 and the Queen Elizabeth Way. *[e.g.]: for example

,This traffic volumes feature class containing Traffic Volumes (also known as Traffic Counts) on California state highway network created from AADT excel spreadsheet file maintained by Caltrans, Division of Traffic Operations.Annual average daily traffic is the total volume for the year divided by 365 days. The traffic count year is from October 1st through September 30th. Very few locations in California are actually counted continuously. Traffic Counting is generally performed by electronic counting instruments moved from location throughout the State in a program of continuous traffic count sampling. The resulting counts are adjusted to an estimate of annual average daily traffic by compensating for seasonal influence, weekly variation and other variables which may be present. Annual ADT is necessary for presenting a statewide picture of traffic flow, evaluating traffic trends, computing accident rates, planning and designing highways and other purposes.,