![]() cities reveal that Los Angeles is ranked sixth in terms of the greatest car accident risks in the nation. With its extensive network of crisscrossed freeways, interstates, and highways combined with its large population, it is little wonder that Los Angeles also experiences a high number of motor vehicle collisions every year.Īccident statistics of U.S. Listing of routes with their designated direction of travel (.PDF).With a population of nearly 3.9 million people in the city and more in the county, Los Angeles is one of the most populous areas in the U.S. Ahead AADT, Peak Month, and Peak Hour usually represents traffic North or East of the count location. Back and Aheadīack AADT, Peak Month, and Peak Hour usually represents traffic South or West of the count location. This data is obtained because on many routes, high traffic volumes which occur during a certain season of the year are more representative of traffic conditions than the annual ADT. The peak month ADT is the average daily traffic for the month of heaviest traffic flow. If relocation results in a change in length, "milepost equations" are introduced at the end of each relocated portion so that mileposts on the reminder of the route within the county will remain unchanged. When a section of road is relocated, new milepost (usually noted by an alphabetical prefix such as "R" or "M") are established for it. The milepost at a given location will remain the same year after year. Milepost values usually increase from south to north or west to east depending upon the general direction (.PDF) the route follows within the state. The milepost values start over again at each county line. The milepost values increase from the beginning of a route within a count to the next county line. All traffic volume figures listed include traffic in both directions unless otherwise indicated.Įach profile breakpoint is identified by the milepost value corresponding to that point on the highway. In addition to the profile breakpoints, these files list county lines and well-known landmarks to aid in orientation. Significant volume changes (breakpoints)in the traffic profile along each route are counted and identified by name and milepost value. Peak hours, peak month ADTs and annual ADTs are shown at each count location. These files list annual traffic volumes for all count locations on the California state highway system. On roads with large seasonal fluctuations in traffic, the peak hour is the four near the maximum for the year but excluding a few (30 to 50 hours) that are exceedingly high and are not typical of the frequency of the high hours occurring during the season. In urban and suburban areas, the peak hour normally occurs every weekday, and 200 or more hours will all be about the same. Unless otherwise indicated, peak hour values indicate the volume in both directions.Ī few hours each year are higher than the "peak hour", but not many. This value is useful to traffic engineers in estimating the amount of congestion experienced, and shows how near to capacity the highway is operating. Included is an estimate of the "peak hour" traffic at all points on the state highway system. planning and designing highways and other purposes. Annual ADT is necessary for presenting a statewide picture of traffic flow, evaluating traffic trends, computing accident rates. 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. Traffic Counting is generally performed by electronic counting instruments moved from location throughout the State in a program of continuous traffic count sampling. Very few locations in California are actually counted continuously. The traffic count year is from October 1st through September 30th. Annual Average Daily Traffic (Annual ADT)Īnnual average daily traffic is the total volume for the year divided by 365 days. Route Number: All California state highways are listed in this booklet in order of Legislative Route number. These files can be imported into spreadsheets or data bases for viewing and analysis. ![]() The files containing Traffic Volumes (also known as Traffic Counts) on California state highways are available for downloading. ![]() For previous year Traffic Counts, visit the main Traffic Census Program homepage to access available PDF or Excel file by year.
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