Use of Vehicle Probe and Cellular GPS Data by State Departments of Transportation (2021) / Chapter Skim
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Pages 13-20
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13 A brief survey was administered to a targeted audience of DOT leadership in all 50 states and the District of Columbia through AASHTO. The survey included 11 questions about state DOT use of vehicle probe and cellular GPS data for monitoring and planning activities.
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14 Use of Vehicle Probe and Cellular GPS Data by State Departments of Transportation Figure 1. The five states that did not respond to the survey are in white above, and include Alaska, California, South Dakota, Wyoming, and West Virginia.
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State of the Practice 15 Use Purpose Agency usage purpose was divided into eight high-level categories as shown in Figure 3. Probe data are still not leveraged highly for responding to customer or media requests, maintenance or asset management purposes.
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Purpose Number of Responses Corridor Study 34 Reliability Measurement 31 Bottleneck Ranking 30 Traveler Information 30 Before-and-after Studies 29 Systems Performance Reporting 27 Travel Time Studies 27 Model Calibration 26 Travel Times on DMS 26 Project Study 24 Situational Awareness (evacuation monitoring, winter weather operations, daily operations, etc.) 24 After Action Incident Reviews 22 Origin-Destination Analytics 22 Real-Time Work Zone Management 21 Arterial Performance Measures 20 Project Prioritization/Scoring 20 User Delay Cost Analysis 20 Event Detection 19 Significant Event Analysis (bridge collapse, commuter train derailment, eclipse traffic impacts, etc.)
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State of the Practice 17 Data Acquisition and Sharing As shown in Figure 5, approximately 40% of agencies are acquiring probe data through traditional RFPs. Others have been able to justify sole source procurements because of specialized data needs or lack of competition.
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18 Use of Vehicle Probe and Cellular GPS Data by State Departments of Transportation 1 7 7 8 10 12 12 13 14 14 20 0 5 10 15 20 25 Not applicable Shared by a partner agency Subscription Other - Write In Through an on-call contractor Lumped together with the procurement or Operations & Maintenance of an ATMS, Traveler Information System, or other system purchase Through a non-profit agency or academic institution As part of a larger Corridor Study or Project Sole source procurement Inter-Governmental Agreement with a University or other State Through issuing an RFP Figure 5. The top 10 ways in which respondents procure third-party probe data.
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State of the Practice 19 Enabling Decision Making Ninety percent of respondents were purchasing data for use in some sort of decision-making exercise -- whether that is as an input to a decision-making system or as the sole decision-making tool. Several agencies noted that the data had empowered them to make key decisions that would have otherwise been difficult or impossible to make -- at least at the same level of certainty.
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20 Use of Vehicle Probe and Cellular GPS Data by State Departments of Transportation – Our TSMO Capital program funds projects largely on this data using an internally developed tool. We use probe/GPS speed data to determine the congestion measures (travel time performance and bottleneck ranking)
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