IMPORTANT DISCLAIMER - Please Read
The County of Riverside's Traffic Counts PDF is a comprehensive listing of Traffic Counts throughout the unincorporated areas of the County. In an effort to provide you with the most comprehensive data available, the County's Traffic Counts come from a variety of sources including, but not limited to: Private Consultants, Municipal Governments, Regional Government Agencies such as Western Riverside Counsel of Governments and Coachella Valley Association of Governments (CVAG), reputable outside agencies which typically contract with Traffic Count and/or Civil Engineering firms to acquire count data, the County's Traffic Count Program, and the County's own Traffic Census Program.
Traffic counts provide the source data used to calculate Average Daily Traffic (ADT), which is the common indicator used to represent traffic volume. Traffic volume is the total volume of traffic on a roadway over a given period of time. Traffic volumes are basic to all phases of highway development and operation. No other single reference tells an engineer, planner, or developer as much about the road as the number of vehicles that use it. Traffic volume data is needed for highway project development, analyzing, monitoring, and controlling traffic movements on highways, highway maintenance, public information, highway legislation, traffic accident surveillance, and for many other purposes.
The very nature of traffic volumes predicates that any number of factors may or may not affect the number of vehicles that travel a roadway on any given day. The Traffic Engineering profession estimates in general, that vehicle travel may vary up to 10% on any given day. Based on these factors, the County of Riverside makes no guarantee on the accuracy of the counts herein contained. By use of the data contained in the Traffic Counts PDF, the user agrees to hold harmless the County of Riverside, including its officers and employees, from any and all liabilities, claims, debts, damages, or actions of any kind arising from the use of this count data.
Types of Counts
All counts represent a 24-Hour Average Daily Traffic (ADT) count for vehicles traveling in both directions. Counts are derived from pneumatic or electronic counters. Some of the counts are derived either through estimation or calculation. Traffic count requests often only require entering volumes. In these cases, the entering volume has been doubled to arrive at an estimated ADT. These calculated count values are indicated by an asterisk [*] immediately following the volume value. There are two primary types of counts:
- Traffic Census Counts
- These locations are counted bi-annually as part of the County's Traffic Census Program.
- Traffic Engineering Counts
- These are traffic counts which are made for specific traffic engineering studies and are not likely to be repeated in regular intervals.
- Or they are traffic counts which are made approximately every 7 years to update an Engineering and Traffic Survey (E&TS). These survey's may be done early if work was done that impacts the volume of cars on that road.
Format of Counts
The County of Riverside's Traffic Counts PDF lists all count locations in alphabetical order by primary street and cross street. They are then listed in descending chronological order. The following is an explanation of the count record fields.
- Location: Primary street.
- Direction: N = North; S = South; E = East; W = West
- X-Street: Cross street.
- Notes: If the counts were acquired as part of the County's Traffic Census Program (CENSUS) or from Coachella Valley Assocation of Governments (CVAG), etc. If left blank, they were acquired by the County of Riverside themselves.
- Date: Date count was taken in the form MM/DD/YYYY.
- Station#: A number assigned to each geographic count location point.
- Day: Day of the week on which the count was taken.
- ADT: Average daily traffic volume.
Additions / Deletions of Count Stations
As part of the County's Traffic Census Program, count locations or stations are reviewed on an annual basis for relevancy and usefulness. Some count locations are required by State and Federal Programs which may vary from year to year. As vacancies are created by changing requirements or diminished usefulness, other locations are recommended based on development, motorist habits, or other factors.