Using Technology to Improve Traffic Operations
The Vancouver Area Smart Trek (VAST) program, led by RTC, is a partnership of transportation agencies in the Clark County region that work to improve transportation system performance by collaborating on signal systems, freeway and arterial management, traveler information, and transit signal priority projects through the use of smart technology and the system infrastructure needed to support it.
The VAST program focuses on the non-capital side of regional transportation planning. The VAST agencies (WSDOT, Clark County, City of Vancouver, C-TRAN, and City of Camas) have been cooperating since 2001 to make better use of existing transportation facilities by improving system efficiency and performance without expanding road capacity.
This cooperation has been a valuable pathway for developing and securing funding for ITS/operations projects totaling more than $27 million in federal funding over the last 15 years, resulting in projects that directly improve transportation operations and building the supporting communications technology systems.
Projects funded through the program include central signal system upgrades, new signal controllers, signal optimization, ramp metering, freeway and arterial detection, cameras, variable message signs, and transit signal priority as well as the fiber and network communications infrastructure needed for connecting ITS devices.
VAST collaboration has also led to other successful partnerships. RTC and the VAST agencies have an ongoing partnership with Portland State University in the regional transportation data archive known as Portal. The Portal archive contains, in a single location, historical and real-time transportation data from agencies in the Vancouver-Portland region and can be used by researchers, planners, traffic engineers, and the public to look at transportation performance throughout the region.
Fiber optic networks are vital to communicating with and operating transportation devices in the field for and bringing data back to agency operations centers. VAST agencies have had an agreement in place since 2006 to share unused fiber capacity with each other saving agency costs and resources instead of having to build new fiber routes separately. This agreement has led to 115 miles of shared fiber, saving agencies from $17 to $21 million than if they were to construct their own projects.
In looking to future transportation trends and advances in technology, many experts envision tremendous growth of connected vehicles, which can exchange data with roadside infrastructure, and autonomous, or self driving, vehicles. Forecasts on the impact of these imminent mobility changes vary wildly. RTC, in cooperation with the VAST partners, is starting a conversation with regional stakeholders to make sense of the possible impact on roadways, land use, and transit service and is an area that will be explored in 2018.