Spokane Regional Transportation Management Center (SRTMC)

About Us

Spokane Regional Traffic Management Center
221 W. First, Suite 310
Spokane, WA 99201

Operation Board Members

  • Spokane Regional Transportation Council
  • Washington State Department of Transportation
  • City of Spokane
  • City of Spokane Valley
  • Spokane County
  • Spokane Transit Authority

The Spokane Regional Transportation Management Center [SRTMC] was created as a multi-jurisdictional control facility to enhance and support advanced transportation management capabilities. The SRTMC is controlled and funded by the Cities of Spokane and Spokane Valley, Spokane Transit Authority, Spokane County, Washington State Department of Transportation, and the Spokane Regional Transportation Council.

Located in the heart of Spokane at the Intermodal Center (Amtrak rail and Greyhound bus station), the SRTMC is a 900 square-foot facility providing three full workstations for operators, two 84-inch rear projection LCD displays, and nine analog video monitors.

The SRTMC has been a 24/7 operation since November 2003.  The center operators coordinate closely with local first response agencies, the regional 911 center, and the state police from Washington and Idaho. From the center, the operators have access and control to most of the regions devices used to monitor and control traffic, which include nearly three dozen closed-circuit TV cameras, six dynamic message signs, twenty traffic measurement stations, and three highway advisory radio stations.

Technical Background

There are currently two Advanced Traffic Management Systems [ATMSs] deployed in the Spokane Region. The ACTRA system was deployed approximately seven years ago for the control of ~220 traffic signals owned and controlled by the City of Spokane. The i2TMS system was deployed in 2001 for the control of closed-circuit cameras [CCTV], dynamic message signs [DMS], and traffic signal control devices owned and controlled by Spokane County, the City of Spokane Valley, and the Washington State Department of Transportation [WSDOT].

The SRTMC includes a center-to-center [C2C] communications link between the ACTRA and i2 systems for sharing traffic data in near real-time. The C2C link passes signal status and traffic volume data from the ACTRA system to the i2 system so that the TMC operators can monitor field operations of the signals. The C2C link was developed in accordance with National Transportation Communications for Intelligent Transportation System Protocol [NTCIP] standards.

Communication System

The Spokane region has deployed a network of fiber optic communication links along key regional arterials with full build out providing redundant rings. Currently, there is fiber optic cable running along I-90 and along Division (major north-south roadway). Many ITS devices are connected to the fiber optic communication system, such as DMSs, CCTVs, and traffic signals.

The region has also successfully deployed a wireless communication system. Presently, there are six CCTV cameras bringing near real-time video images back to the TMC. There are a few traffic signals that are communicating via wireless communication.

Regional Traffic Management

From the SRTMC, the operators have current status information of ITS devices throughout the region, even though there are different operating systems controlling those devices. The regional system collects information about ITS devices and displays that information on a single view. No special software is needed to view the regional system it is a web-services based application, and the user only needs a standard web browser. From a single application, the operator can visually assess freeway flow conditions, view and control CCTV cameras, place messages on DMSs, implement response plans, check the status of traffic signals, and analyze historical traffic performance.

In 2007, a comprehensive update was conducted to the Spokane Metro ITS Implementation Update to identify additional projects and based on the region's needs and operational issues. View the report here.  The file is large and could take a few minutes to download.  ITS Implementation

Performance Measurement System

The Spokane system measures traffic volume and speed using roadway sensors (data collection stations). The roadway sensors are remote microwave sensors by EIS. There are a number of data collection stations currently deployed along Interstate 90, with plans for future expansion. These data are collected on 30-second polling periods and stored in a relational database for near real-time and historical analysis. The Spokane system uses the Performance Measurement System [PeMS], which is integrated with the regional system described above. Using the PeMS application, the system users can view roadway performance over a historical time period and view the results in a wide variety of formats. The PeMS system provides users the ability to monitor detector performance, health, and perform troubleshooting, if needed.

Technical Details

Type of TMC

Multi-Agency

Funding Source

Regional funding annually from regional partners, Legislative ITS project earmarks, CMAQ, and other sources.

Hours of Operation

24/7/365

Number of Operators

6

Number of TMC Managers (shared with local government)

1

Number of IT Managers (shared with local government)

1

Size of Facility

900 square-feet

Facility Layout

4 workstations, display wall, communications room

System Design

Traffic Signal Controllers
  • EAGLE EPAC NEMA controller using ECOM protocol
  • EAGLE 2070 ATC using NextPhase over Ethernet (IP communication)
  • PEEK 3000 over serial
Dynamic Message Signs
  • 3M
CCTV
  • Cohu
  • Pelco
Data Collection Stations
  • EIS remote traffic microwave system
Regional Integration
  • Center-to-center communication using national standards (XML)
  • Type of data shared: traffic signal status, phase status, volume and speed data
  • Regional Response Plan System: command traffic patterns across two traffic control systems.