High-Level Design (130 unique lessons found)

Connected vehicle warning systems should provide drivers with actionable information that supplements in-vehicle alerts.
An analysis of truck driver behavior, as part of Wyoming’s Connected Vehicle Pilot Program, finds that connected vehicle warnings alone are ineffective

Further research, testing, and safety features should be developed to help drivers manage the transition from automated to manual control of a vehicle.
A detailed analysis of California Department of Motor Vehicle crash records examines the most frequent types of automated vehicle crashes.

Emphasize pilot projects to get real-world data on impact of automated vehicles, recommends United Kingdom mobility inquiry.
The report, a product from the Commission on Travel Demand, outlined the current state of shared mobility in the United Kingdom and recommended paths forward.

National Operations Center of Excellence (NOCoE) provides updates on operational SPaT Challenge deployments in recorded Webinar #10.
Webinar details several operational SPaT deployments, with an emphasis on lessons learned and discussion that encompasses all stages from planning, procurement, installation, testing, and operations.

Cat's eye retro-reflectors extend the range of lane detection when using automated vehicle camera technology at night, especially in inclement weather.
A presentation on automated vehicle camera technology and performance considerations for Advanced Driver Assist Systems (ADAS) applications.

Wyoming CV Pilot offers best practices for integrating and using data from CVs into the TMC to enhance day-to-day roadway operations.
The Wyoming Department of Transportation is integrating connected vehicle technology into its statewide transportation management center under the USDOT's Connected Vehicle Pilot Deployment Program.

Consider road geometry carefully before implementing part-time shoulder use lanes.
PTSU's effects are strongest along congested segments of road, but can be severely impacted by placement and positioning of ramps or merging lanes.

Simplify graphical design and presentation of information to make transportation apps more accessible and user-friendly to older travelers.
By focusing on a straightforward, intuitive user experience, apps can be made more appealing and easy-to-use to all users.

Understand cities' markets and customer bases to define a tailored service and increase the utilization rates of carsharing and new mobility services.
Best practices for launching new mobility services and scaling business models to achieve maximum profitability.

Cross-validate data streams and identify areas where automated processes can reduce workloads to efficiently and effectively manage traveler information.
The best-practices report from Caltrans identifies key strategies to handle and process data on a state-wide scale.

Experiences from truck parking information system pilot demonstrate that detectors must be properly oriented to the roadway and should be calibrated daily to maintain high detector accuracy.
A truck parking availability information consisting of dynamic message signs (DMSs), a mobile application, a public Web site, and an interactive voice response system (IVR) to disseminate the real-time information to truck drivers is tested Tennessee.

Maintain stakeholder buy-in and engage the community throughout the design process to ensure your Travel Management and Coordination Center is successful.
The suggestions, derived from San Luis Obispo County's own experiences creating and implementing their TMCC, provide useful detail to agencies looking to implement a TMCC in their own area.

To minimize emissions, adhere to high performance design specifications.
The report, performed by the Connecticut Academy of Science and Engineering, identified key modernization techniques to minimize the overall carbon footprints of the agency's rolling stock and facilities.

RSU triangulation techniques and inertial GPS solutions can improve geolocation accuracy for connected vehicles operating in dense urban environments.
New York City CV Pilot considered location correction solutions to address GPS positioning challenges associated with the cities "urban canyons"

Cast a broad net in evaluating traveler behavior: Managed Lanes analysis finds evidence of "theory blindness" that can impact model accuracy.
The report, submitted to the TRB Annual Meeting, found that traveler behavior often conflicted with expected behavior.

Tune traffic density and speed parameters within connected vehicle (CV) applications to balance proper alerts versus false alarms in dense urban environments.
U.S. Department of Transportation Free Public Webinar Series on the Connected Vehicle Pilot Sites System Design Process.

Perform early real-world testing of connected vehicle technology with actual infrastructure in place to verify end-to-end system/application performance
U.S. Department of Transportation Free Public Webinar Series on the Connected Vehicle Pilot Sites System Design Process

Use current SAE, IEEE, and NTCIP standards with systems engineering content to control architecture and design activities for a connected vehicle network.
Experiences from the Wyoming Department of Transportation's (WYDOT) Connected Vehicle Pilot Deployment System Design Phase.

Industry Experts Offer Recommendations for Enterprise-wide Security Controls for the Connected Vehicle Environment.
Report provides a series of lessons learned for developing security systems around Connected Vehicles.

Validate the performance of dedicated short-range communication (DSRC) radios for cooperative adaptive cruise control (CACC) applications by testing receiver signal strength, signal delay, and packet error rates.
USDOT developed an evaluation framework to validate the performance of vehicle-to-vehicle communications for cooperative adaptive cruise control (CACC) systems.

Texas DOT offers recommendations and best practices for agencies looking to anticipate widescale implementation of connected and automated vehicles.
The recommendations include a detailed roadmap of how the agency--and others--should respond to the increasingly relevant technologies.

Use a local SQL Lite database with positional data to improve the performance of GIS applications
Evaluation of the Wyoming DOT's Road Condition Reporting Application

Clearly communicate requirements and testing procedures to connected vehicle device developers, and allow for industry input and iteration for less mature devices.
Experience from fostering the development of connected vehicle devices for the Safety Pilot Model Deployment in Ann Arbor, Michigan.

When implementing congestion pricing, considerations must be made for the impact dynamic tolling will have on travel choice and behavior among a specific region and/or corridor’s travelers.
Seattle/Lake Washington Corridor (S/LWC)’s Urban Partnership Agreement (UPA) corridor users’ experiences with congestion pricing and its impact on their travel behavior.

Design blind spot warning systems to minimize false alarms.
Promising technologies for commercial motor vehicles (CMVs) in North Carolina.

Plan to recalibrate traffic sensors to accommodate lane shifts and other changes near work zones.
Experience using multi-jurisdictional ITS to support freeway work zone operations.

Plan adequate time to calibrate Bluetooth readers to maximize accuracy and reliability.
Experience using Bluetooth to support traffic mobility monitoring in Salt Lake City.

Deploy arterial travel time detection systems incrementally to allow time to identify issues and fine-tune performance.
A review of arterial travel time technology in the United States and the United Kingdom

Avoid unnecessarily restrictive requirements and ambiguous terms in bid documents.
Experience implementing real-time travel time information systems on I-35 in Minnesota.

Use in-vehicle audible alerts in addition to visual safety alerts to improve speed limit compliance.
A 500-participant Minnesota Road Fee Test Study investigated technologies to charge mileage-based user fees and improve compliance with traffic control devices.

Separately deploying mileage-based user fee and in-vehicle safety alert functions helps ensure each technology has the best opportunity for user acceptance.
The 500-participant Minnesota Road Fee Test Study investigated technologies to charge mileage-based user fees and improve compliance with traffic control devices.

Deploy reversible lanes on arterial streets to improve capacity in the peak direction, but note that it may yield higher collision rates.
The effects of a reversible lane deployment in Roswell, Georgia are emphasized when the system is non-operational for maintenance during peak periods.

Michigan DOT lays out near-term deployment steps for connected vehicle communications infrastructure
Michigan Department of Transportation (MDOT) proposes a framework for an infostructure plan for connected vehicle deployment

Implement Effective Risk Mitigation Strategies and Use Defined Success Factors to Better Manage ITS Application Development and Deployment
The USDOT evaluated Eight National ITS Application Test Sites to determine whether these projects met goals and to extract lessons learned in development and deployment.

Ensure machine vision cameras are aligned to properly detect the onset of a queue.
Experience with advanced queue detection systems in Minnesota.

Develop a Freight Transportation Data Architecture to Optimize Freight Transport .
The Transportation Research Board National Cooperative Freight Research Program assessed the benefits in developing a Freight Transportation Data Architecture.

Conduct bench testing prior to field installation of transit signal priority (TSP) equipment to verify functionality between detectors, signal controllers, phase selectors, and cabinet design.
Pilot deployment of transit signal priority in Chicago identified multiple considerations that may help inform future deployments.

Understand the Impacts on Public Sector Infrastructure due to Connected Vehicle Deployments
A survey of lessons learned through deployment of V2I test beds

Beware that modeling may not be a suitable substitute for before-after studies of ITS integration projects.
Experience from Minnesota's Traveler Information Guidance and Emergency Routing (TIGER) Project.

Draw on the strengths of complementary relationships between the public and private sectors for successful implementation of ITS projects.
The E-470 Public Highway Authority’s experience in forging public-private partnerships for design, construction, operations, and maintenance of an electronic toll highway facility.

Coordinate extensively with agency staff and vendors when integrating a Transportation Management Center with Computer Aided Dispatch Systems.
Utah's experience with integrating a Transportation Management Center with Computer Aided Dispatch systems.

Build a strong partnership between transportation and public safety agencies, and establish clear operational rules from the start.
An experience operating a CAD-TMC (Computer-Aided Dispatch - Traffic Management Center) in Washington State.

Be aware of technology and training issues when pioneering new transit technologies.
Experience from the Lake Tahoe Coordinated Transit System.

Exercise careful planning in preparation for issuing an RFP to help mitigate cost, schedule, and performance risks.
The Riverside Transit Agency experience with the methods of award and terms and conditions used to procure equipment and software for automatic vehicle location (AVL) and computer-aided dispatch (CAD).

Engage in project planning and make initial decisions about the ITS procurement process.
Experience from a review of ITS contracting methods and practices. Step 1 of the Decision Model.

Adhere to the proposed standard evaluation approach in order to facilitate high response rates and to collect reliable data on 511 implementation.
Experience from Implementing a Standard Evaluation Approach and Measures as Part of the Arizona 511 Model Deployment.

Involve and collaborate with a broad range of users during software design, development, testing, and deployment to increase the return on investment.
New Mexico Department of Transportation's experience in designing and deploying a web-based software application to simplify the increasing complexity of coordinating rural transit funding.

Optimize travel time messaging operations by improving the way in which data is collected, analyzed, and displayed.
Four American Cities' experiences with Travel Time Messaging on Dynamic Message Signs.

Consider that integration with existing ITS technologies and the vendor selection process can impact project implementation schedules and costs.
Washington's experience in deploying five Advanced Traveler Information System (ATIS) projects and developing a standardized approach for evaluating ATIS projects.

Implement ATIS technology in a way that supports the maintenance staff.
Washington's experience in deploying five Advanced Traveler Information System (ATIS) projects and developing a standardized approach for evaluating ATIS projects.

Consider that ATIS deployment in rural and/or remote areas presents special challenges.
Washington's experience in deploying five Advanced Traveler Information System (ATIS) projects and developing a standardized approach for evaluating ATIS projects.

Implement standardized procedures for sharing, accessing and storing transportation data across the enterprise.
Five transit systems' experiences with geographic data systems technology investment.

Provide drivers with sufficient managed lane information that can be easily disseminated and understood.
A guidance provided by the Texas Transportation Institute on providing user information in managed lanes facilities.

Include significant planning and development time in the overall project schedule to accommodate identifying and addressing the various compatibility issues, to integrate existing legacy system equipment across multiple agencies.
Orlando, Florida's experience with a Field Operational Test (FOT) on using a single smart card for transportation payments at facilities operated by multiple regional agencies.

Consider using real time traffic control system to overcome mobility and safety obstacles in a work zone.
An Illinois Department of Transportation experience using ITS in work zones.

Investigate procurement alternatives of leasing, buying, or building equipment to minimize operations and maintenance costs.
Montana Department of Transportation's experience in procuring hardware and software for the statewide 511 traveler information system.

Design the 511 system to handle the surge in call volume during major events.
A national experience with the development and deployment of 511 Systems.

Implement infrastructure-based collision avoidance technology to mitigate risks at crash prone intersections.
A research project based on literature reviews and working with Virginia, California, and Minnesota.

Maximize Field Operational Test (FOT) success by creating a sound experimental design and data acquisition plan.
Experience from a Field Operational Test (FOT) in Michigan to evaluate a Roll Advisor and Control (RA&C) system for commercial vehicles.

Improve management and operational procedures during a natural disaster by extending and supporting communication systems and networks.
A Texas Department of Transportation (TxDOT) experience with Tropical Storm Allison's effect on the Houston Metropolitan Transportation system.

Design an ITS procurement process carefully to ensure the best outcome for vendor selection and performance.
Five rural transit agencies' experiences in applying ITS to rural transit.

Enable and enforce managed lane facilities using various ITS tools.
The experience of four State DOTs and Canada in enforcing managed lanes facilities.

Provide easy and low-cost access to ITS data to facilitate data usage.
National experience with ITS data archiving, sharing and usage.

Design the system to withstand the demands of the physical environment in which it will be deployed.
Virginia's experience implementing a pilot automatic vehicle location (AVL) system in an urban winter maintenance operations setting.

Use ITS Standards to achieve interchangeability and interoperability for Dynamic Message Signs.
Experience of nine agencies using Dynamic Message Signs built to NTCIP specifications.

Integrate market research in the planning process for consumer-oriented projects.
Experience in the deployment of a traveler information system for Interstate 95

Follow a modular approach when deploying complex projects in locations with a shortened construction season.
Experience from the Integrated Corridor Traffic Management Project in Minnesota

Ensure that qualified staff with expertise in telecommunications is involved, as planning for and designing a telecommunications network is complicated.
Experiences from the Departments of Transportation (DOTS) of multiple states in selecting telecommunications options.

Consider cost-saving strategies and long term needs when making communications investments.
National experience with making communications investments for incident management.