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Delaware Department of Transportation

Integrated Transportation Management System

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Technology

ITMS Tools, Devices, Systems

Delaware’s Department of Transportation (DelDOT) and our partners ((Division of Communications (DivComm), with the support of the Federal Highway Administration (FHWA), and the Department of Technology and Infrastructure (DTI)), have built a robust state-owned telecommunications network. Telecommunications is behind everything we do (and will do), from moving enormous amounts of real-time data to enabling critical executive management communications during severe incidents. Investment in fiber is a future-proof investment that provides long-term control over cost and outstanding government services

Variable Speed Limit Sign

VSL signs allow the TMC to remotely ad-just the posted speed limit along a corridor based on road, traffic, and weather condi-tions. Electronic signs slow traffic ahead of congestion or bad weather to increase traffic flow, lessen stop-and-go condi-tions, and reduce risk of crashes.

How Does it Work?

TMC technicians manage variable speed limits based on roadway conditions and input from law enforcement. Variable speed limit signs are placed in accordance with the DE MUTCD and follow the same standards required for static SPEED LIMIT (R2-1) signs.

Tmc App

Dash Cam

A dashboard camera that is attached to a vehicle, used to capture live video and/or still photos.

How Does it Work?

Camera feeds from the vehicle are monitored in real-time and allow technicians to view area if there is an incident, weather, or road safety issue.

dash cams

Fixed Video Cameras

Video is primarily used for monitoring of current traffic conditions and verifying roadway incidents:

  • Crashes
  • Disabled Vehicles
  • Construction
  • Maintenance activity
How Does it Work?

Cameras placed high above roadway, located in areas to provide line of sight to view other nearby traffic control devices.

Tmc App

Roadway Weather Information System (RWIS)

RWIS measures atmospheric, pavement and water level conditions including:

  • Air temperature
  • Surface and sub-surface temperature
  • Dew temperature
  • Relative humidity
  • Wind direction
  • Wind speed
  • Wind gust
  • Visibility
  • Precipitation
How Does it Work?

Environmental Sensor Stations (ESS) in the field, a communication system for data transfer and central systems collecting field data from numerous ESS come together to measure atmospheric, pavement and/or water level conditions

Tmc App

Computer-Aided Dispatch (CAD)

Monitors rainfall events. High flow events and erosion

How Does it Work?

Composed of a group of stations (gauges) that are designed and operated to make observations about flooding and/or erosion

Computer-Aided Dispatch (CAD)

Centralized statewide control and management of the Computer Aided Dispatch (CAD) to CAD connections with County Emergency Operations Centers (EOCs) and State Police.

How Does it Work?

DelDOT receives notifications from public safety answer points (PSAPs) of incidents affecting the transportation system.

Tmc App

Signal System Loop Detectors

Signal system loops collect real-time data along signalized corridors to provide TMC with current traffic volumes. The information collected provides the TMC and signal controller unit with current traffic volumes along the corridor and can be used to determine signal-timings.

How Does it Work?

DelDOT receives notifications from public safety answer points (PSAPs) of incidents affecting the transportation system.

Tmc App

Microwave Detection (Wavetronix)

Microwave Detection (Wavetronix) detect vehicles by line, provides real-time traffic volume, speed and delay to the TMC, and classifies vehicles by length. Each detector is positioned adjacent to the road, non-intrusive to traffic. Changes in real-time data indicate to TMC technicians of lane blockages and roadway issues.

How Does it Work?

Microwave Detection (Wavetronix) are spaced methodically to allow for the accurate calculation of travel time and delay. Vehicle length measurements are correlated to the FHWA vehicle classification system.

Tmc App

Automatic Traffic Recorders (ATRs)

All measure volume. Some measure class. Some measure speed.

How Does it Work?

Automatic ATRs are installed in the road and electronically measure count, classification and/or speed data. The data is recorded in memory and can be downloaded and viewed for further analysis. The data is not yet real time.

Bluetooth Detection

Bluetooth detection detects signals that are being emitted from discoverable Bluetooth devices within vehicles as the vehicles pass the Bluetooth monitoring station. This technology is used to garner real-time travel information:

  • Average travel times
  • Average travel speeds
  • Average travel patterns
How Does it Work?

A vehicle containing a detectable Bluetooth device is observed at two stations. The Media Access Control (MAC) address and time of detection is logged, and the information is used to obtain a sample travel time for the segment.

Tmc App

Traffic Advisory Radio (WTMC 1380AM)

DelDOT’s designated AM radio frequency (WTMC 1380AM) updates travelers on roadway and transit conditions allowing drivers to make informed decisions regarding travel plans. The main transmission tower is located near the City of Wilmington. There is 1 repeater in New Castle County, 3 in Kent County and 7 repeater sites in Sussex County and the number of repeaters is growing.

How Does it Work?

WTMC 1380AM is transmitted via a tower near the City of Wilmington. Due to low signal strength of the current tower, DelDOT synchronizes the tower transmission with numerous repeater HAR/TIS stations to strengthen the station range in order to effectively provide motorists with traffic advisory information.

Tmc App

Variable Message Signs

Electronic traveler information signs used to provide information in support of incident management, construction activities, adverse environmental conditions, and changes in traffic patterns and special events.

How Does it Work?

Traveler information pushed from TMC to permanent, portable or virtual signs.

Tmc App

Traffic Signals

Control competing flows of traffic.

How Does it Work?

Traffic signals are monitored and adjusted to serve changing patterns based on volume and speed data.

Tmc App

HAWK Signal

Signal stops road traffic and allows pedestrians to cross safely.

How Does it Work?

High-intensity activated crosswalk pedestrian beacon is triggered by pedestrian request.

Tmc App

Weigh Station

A weigh station is a checkpoint along a highway to inspect the weight of trucks and commercial vehicles.

How Does it Work?

Weigh-in-motion technology is used to screen trucks for weight. Truck weight triggers a signal to light indicating that the driver should pull over for further inspection. Vehicles within the weight restrictions are signaled to proceed back to the highway.

Tmc App

Emergency Access Gate Control System

Emergency Access Gate Control Systems are located along limited access roadways (I-495, SR 1) that can be opened when needed to provide access for incident management and maintenance activities.

How Does it Work?

Emergency Access Gates can be opened remotely by the TMC or on-site by emergency vehicle Opticom sensors.

Emergency Gate Emergency Gate


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