Evaluating Alternative Operations Strategies to Improve Travel Time ...

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SHRP 2 L11: Final Report Figure 7.1 - Concept for Valuing Travel-Time Reliability Local Transportation Agencies • Traffic signal timing and signal optimization strategies are deployed. • Traveler information systems are being deployed. Private Data Information Providers • Traffic and weather conditions are available from web-sites, radio traffic reports, and twitter. • Travel-time data is available from private firms. Emergency Responders • Some of the major highway corridors have incident response coverage which is coordinated among jurisdictions. • Some ITS applications are in place. • Service Patrol Programs such as Road Rangers are implemented. Freight Shippers • Freight real-time tracking and advanced scheduling of products delivery are widely used to improve freight travel-time reliability. • Just in time (JIT) manufacturing has motivated comprehensive logistics management to respond to network reliability. Vehicle Manufacturers • Luxury car models have in-vehicle safety systems like automated cruise control and lane departure warning systems. A CONCEPT OF OPERATIONS Page 103
SHRP 2 L11: Final Report • All new vehicles have stability control and air bag systems. • Vehicle manufacturers have teamed up with the USDOT and State DOTs to develop Vehicle Infrastructure Integration (VII), an initiative to provide vehicle-to-vehicle communications and to improve safety and mobility. Vehicle Infrastructure Integration (VII) is currently being tested in California and Michigan. Travelers • Increased use is being made of traveler information through cell phone and Internet services. • Onboard distractions from phones, TV, and games contribute to reduced reliability. • Travelers are purchasing vehicles with higher safety ratings and/or in-vehicle information systems. • Telecommuting is increasingly common but still only accounts for a tiny fraction of the urban travel market. FUTURE SCENARIOS OVERVIEW – A CON OPS PERSPECTIVE The key characteristics that describe future conditions are described below. For the future baseline, optimistic, mediocre, and pessimistic conditions, technologies, organizational activities, and key responsibilities are described. Overview of Future Baseline Conditions A realistic, yet beneficial situation can be achieved with today's technology if agencies are committed to implementing performance-driven strategies. The technologies for the future baseline condition involve widespread deployment of all current traffic-management strategies such as ramp metering, variable speed limits, hard shoulder running, congestion pricing, truck lanes, and adaptive signal control across all major urban areas as compared with the patchy deployment of today. The key factor to achieve this is an increased level of technical integration and interagency coordination. All of these technologies can be operated as an active traffic management system. The deployment of currently available traveler information systems such as DMS, HAR, 511, traffic websites, radio traffic reports, and Twitter, will be common among transportation system operators. Both real-time and historical information will be disseminated. Congestion information will be available for both freeways and major arterial roadways and will be coordinated across jurisdictions so that customers can use one portal to access all of the information. Weather and road condition information will be factored into traffic management decisions in addition to being used for winter road maintenance. Comprehensive real-time and predictive weather and road condition information will be provided to the public. All roadways will have incident response coverage, which is coordinated among jurisdictions. All safe and legal commercial vehicles will bypass inspection and weigh stations at freeway speeds. Agencies will have some type of performance data for all of their roadways and will provide limited reporting of performance. These data will be provided in an archive that can be easily accessed in a usable format. Work zone management will be widespread and information of traffic delays related to work zones will be available to the public. A CONCEPT OF OPERATIONS Page 104
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