DI-9 Manual PDF - Utah Department of Public Safety

20. Traffic Control DeviceDefinition: The type of traffic control device (TCD) applicable to the motor vehicle at the crashlocation.Enter the appropriate two-digit code for each vehicle in Box 20:00 None01 Traffic Control Signal02 Flashing Traffic Control Signal03 Stop Sign04 Yield Sign05 Warning Sign06 Flagger or Officer07 HOV Lane08 Ramp Metering – Active09 School Zone10 School Zone Reduced Speed – Active11 Railroad Crossing-No Signal12 Railroad Crossing-Signal/Gate97 Other*99 UnknownRationale: Needs to be collected at scene because the presence of specific devices is better verifiedat the time of the crash. Important for ascertaining the use of various traffic control devices (TCD)and crashes, and identifying the need for upgraded TCDs at specific crash locations. These caninclude flashing signals, school zones, stop, yield warning, railway crossing signs/signals, etc.21. Roadway DescriptionDefinition: Indication of whether or not the trafficway for this vehicle is divided and whether itserves one-way or two-way traffic. A divided highway is a facility that is continuously separated byeither a barrier or a raised/depressed median between the opposing directions of traffic.The part of a trafficway designed, improved, and ordinarily used for motor vehicle travel, or wherevarious classes of motor vehicles are segregated, that part of a traffic way used by a particular class.Enter the appropriate two-digit code for each vehicle involved in crash in Box 21:01 Two-Way, Not Divided02 Two-Way, Not Divided With a ContinuousLeft Turn Lane03 Two-Way, Divided, Unprotected Median04 Two-Way, Divided, Positive Median Barrier05 One-Way99 UnknownRationale: Used in classifying crashes and identifying the environment of a crash. Note that thedata must be collected by the reporting officer at the scene. It is not derived from road data such asclassification or route. Important to guide future trafficway design and traffic control. Separateroadways may be provided for northbound southbound traffic (as well as eastbound andwestbound) or for trucks and automobiles. Bridle paths, bicycle paths, and shoulders are notincluded in this definition.53