ODOT RWIS Stations

Status: Existing


RWIS (Roadway Weather Information System) is operated by the Ohio DOT through 158 weather stations, which provide coverage in all 88 of Ohio's counties. A central service located in Columbus processes the information from each station. Ohio DOT garages use the information collected by the stations to plan their road treatment activities, especially during snow and ice conditions. Ohio DOT also makes road conditions available to the public via a Web server (http://www.ohgo.com/index). The weather stations and sensors are located along interstates, U.S. routes, and state routes. The system comprised 88 wireless weather stations and more than 160 pavement sensors. Two types of weather stations are installed: those located along highways, and those located at county ODOT offices. The stations report a variety of information, including: Air temperature; Precipitation rate/type; Surface temperature; Sub–surface temperature; Wet/dry surface; Dew point Relative humidity; Wind direction and speed; Traffic speeds and counts; Visibility. Data communications between the weather station and the central server at Ohio DOT Statewide TMC is conducted via cellular service in 5–minute intervals.


StakeholderRoleRole Status

Physical Objects

ITS Roadway Equipment

Functional Objects

Functional ObjectDescriptionUser Defined
Roadway Barrier System Control'Roadway Barrier System Control' includes the field equipment that controls barrier systems used to control access to transportation facilities and infrastructure. Barrier systems include automatic or remotely controlled gates, barriers and other access False
Roadway Basic Surveillance'Roadway Basic Surveillance' monitors traffic conditions using fixed equipment such as loop detectors and CCTV cameras.False
Roadway Environmental Monitoring'Roadway Environmental Monitoring' measures environmental conditions and communicates the collected information back to a center where it can be monitored and analyzed or to other field devices to support communications to vehicles. A broad array of weatFalse
Roadway Time Management'Roadway Time Management' provides foundational time keeping functionality that supports an accurate, synchronized time reference in ITS field equipment. It receives accurate time information from an external source and maintains a local time reference uFalse
Roadway Variable Speed Limits'Roadway Variable Speed Limits' includes the field equipment, physical overhead lane signs and associated control electronics that are used to manage and control variable speed limits systems. This equipment monitors traffic and environmental conditions False
Roadway Warning'Roadway Warning' includes the field equipment used to warn drivers approaching hazards on a roadway. Warnings may be generated in response to roadway weather conditions, road surface conditions, traffic conditions including queues, obstacles or animals False

Physical Standards

Document NumberTitleDescription
ITE ATC 5301Intelligent Transportation System Standard Specification for Roadside CabinetsThis standard specifies the characteristics of a modern controller cabinet for the ITS industry.
NEMA TS 8Cyber and Physical Security for Intelligent Transportation SystemsThis specification describes how agencies and other transportation infrastructure owner/operators should implement cyber– and physical–security for ITS.

Interfaces To

(View Context Diagram)

Maintenance and Construction Field Personnel
ODOT / KYTC Connected Vehicle Roadside Equipment
ODOT District 8 Maintenance Garages
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