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I-95 Corridor Coalition Vehicle Probe Project Data Validation – MD #11 – I-895 and I-95 EXP 1 October 2017

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I-95 Corridor Coalition Vehicle Probe Project Data Validation – MD #11 – I-895 and I-95 EXP 1 October 2017 I-95 Corridor Coalition Vehicle Probe Project: HERE, INRIX and TOMTOM Data Validation Report for Maryland (#11) Baltimore Harbor and Fort McHenry Tunnels, I-95 Express lanes Prepared by: Masoud Hamedi, Sanaz Aliari University of Maryland, College Park Acknowledgements: The research team would like to express its gratitude for the assistance it received from the state highway officials in Maryland during the course of this study. Their effort was instrumental during the data collection phase of the project. This report would not have been completed without their help. Data Collected: March 29 to April 10, 2017 Report Date: October 2017 1 Table of Contents Executive Summary ............................................................................................................... 3 Methodology .......................................................................................................................... 6 Corridor Description and Data Collection ............................................................................. 6 TMC segments selected for validation in Maryland .............................................................. 8 Analysis of Freeways ........................................................................................................... 10 Results .................................................................................................................................. 11 Analysis of Freeway Results for HERE Data ...................................................................... 11 Analysis of Freeway Results for INRIX Data ..................................................................... 12 Analysis of Freeway Results for TOMTOM Data ............................................................... 13 Appendix .............................................................................................................................. 14 2 List of Tables ES Table 1– I-895 Baltimore Harbor Tunnel, I-95 Express lanes and Fort McHenry Tunnel Description ............................................................................................................................. 3 ES Table 2- HERE Freeway Evaluation Summary for Maryland ......................................... 4 ES Table 3- INRIX Freeway Evaluation Summary for Maryland ........................................ 4 ES Table 4- TOMTOM Freeway Evaluation Summary for Maryland .................................. 5 Table 1- Segments selected for validation in Maryland ........................................................ 9 Table 2- HERE Data quality measures for freeway segments in Maryland ........................ 11 Table 3- Percent observations meeting HERE data ............................................................. 11 Table 4- INRIX Data quality measures for freeway segments in Maryland ....................... 12 Table 5- Percent observations meeting INRIX data quality criteria for freeway segments in Maryland .............................................................................................................................. 12 Table 6- TOMTOM Data quality measures for freeway segments in Maryland ................. 13 Table 7- Percent observations meeting TOMTOM data quality criteria for freeway segments in Maryland .......................................................................................................... 13 Table A.1- HERE data quality measures for individual freeway validation segments in the state of Maryland ................................................................................................................. 14 Table A.2- INRIX data quality measures for individual freeway validation segments in the state of Maryland ................................................................................................................. 15 Table A.3- TOMTOM data quality measures for individual freeway validation segments in the state of Maryland ........................................................................................................... 16 I-95 Corridor Coalition Vehicle Probe Project Data Validation – MD #11 – I-895 AND I-95 EXP 1 October 2017 3 List of Figures Figure 1- Locations of all segments selected on I-895 Baltimore Harbor Tunnel for analysis in Maryland ............................................................................................................................ 6 Figure 2 - Locations of all segments selected on I-95 Express lanes for analysis in Maryland ............................................................................................................................. 7 Figure 3- Locations of all segments selected on I-95 Fort McHenry Tunnel for analysis in Maryland ................................................................................................................................ 7 I-95 Corridor Coalition Vehicle Probe Project Evaluation – MD Validation #11 - I-895 AND I-95 EXP Vendors: HERE, INRIX, TOMTOM 2 October, 2017 Executive Summary Wireless re-identification traffic monitoring (WRTM) data is collected to validate data from Vehicle Probe Project. WRTM data includes Bluetooth, Wi-Fi and other wireless traffic monitoring devices that collect signals emitted by in-vehicle electronic equipment. The specific device type used for each validation, will be determined based upon applicability and will be defined in the report. Specifications used for comparison include the Average Absolute Speed Error (AASE) and the Speed Error Bias (SEB). • Bluetooth re-identification sensors were deployed at the beginning and ending points of 10 different segments along the I-895 Baltimore Harbor Tunnel, I-95 Express lanes and Fort McHenry Tunnel. • Selected segments for I-895 Tunnel corridor stretch from Exit 9 to Exit 10. • I-95 Express lanes segments covers the range from Exit 61 to E Joppa Road. • Fort McHenry Tunnel segment include the stretch between Exit 55 to Exit 56. • (Refer to Figures 1-3 below for overview map snapshots and approximate sensor locations). • Travel time data was collected for both directions along the corridors, between March 29 and April 10, 2017. • The dataset collected represents approximately 2,630 hours of observations along 10 freeway segments, totaling approximately 26 miles. • The total number of effective five-minute travel time samples observed was 31,557. • The results are presented as compared against the mean of the ground truth data as well as the 95th percent confidence interval for the mean, referred to as the Standard Error of the Mean (SEM) band. ES Table 1 provides a summary description of the study corridor. ES Table 1– I-895 Baltimore Harbor Tunnel, I-95 Express lanes and Fort McHenry Tunnel Description Corridor Name Number of Lanes AADT Speed Limit I-895 Tunnel 2 lanes per direction 80,460 50 mph I-95 Express 1 to 3 lanes per direction 134,400 65 mph I-95 Tunnel 2 lanes per bore (4 bores) 118,800 Variable up to 55 mph ES Tables 2, 3 and 4 below summarize the results of the comparison between the WRTM reference data and the probe data from each vendor for freeway segments during the above noted time period. I-95 Corridor Coalition Vehicle Probe Project Evaluation – MD Validation #11 - I-895 AND I-95 EXP Vendors: HERE, INRIX, TOMTOM 3 October, 2017 ES Table 2- HERE Freeway Evaluation Summary for Maryland Average Absolute Speed Speed Error Bias Error (<10mph) (<5mph) Number of 5 Speed Bin Comparison Comparison Comparison Comparison Minute Samples with SEM with SEM with Mean with Mean Band Band 0-30 MPH 4.5 6.4 -0.3 -0.5 233 30-45 MPH 3 5.7 -0.9 -0.2 523 45-60 MPH 3.7 7.9 -3.6 -7.5 2514 >60 MPH 8.3 13.9 -8.3 -13.9 3181 All Speeds 5.9 10.7 -5.6 -9.8 6451 Based upon data collected from March 29, through April 10, 2017 across 26 miles of roadway. • For the HERE data as shown in ES Table 2, the average absolute speed error (AASE) was within specification because all speed bins fell below the required maximum value of <10 mph. • The Speed Error Bias (SEB) was within specifications when compared with the Standard Error of the Mean (SEM) Band for all categories except for the >60 MPH speed bin. The error bias for >60 mph was -8.3 where specifications require a +/- 5mph variation. The value for all speeds is -5.6 • It is important to note that for this report, data from HERE was only available for the Fort McHenry Tunnel (two segments) and the results are based on the analysis of a partial data submission. ES Table 3- INRIX Freeway Evaluation Summary for Maryland Average Absolute Speed Speed Error Bias Error (<10mph) (<5mph) Number of 5 Speed Bin Comparison Comparison Comparison Comparison Minute Samples with SEM with SEM with Mean with Mean Band Band 0-30 MPH 7.1 8.3 -0.3 0 974 30-45 MPH 5.6 8.1 2.8 3.7 2047 45-60 MPH 4.4 7.5 1.4 2.3 9756 >60 MPH 2.4 5.4 -1.9 -3.6 18780 All Speeds 3.4 6.3 -0.5 -1.2 31557 Based upon data collected from March 29, through April 10, 2017 across 26 miles of roadway. • For the INRIX data shown in ES Table 3, the average absolute speed error (AASE) was within the maximum specification of <10 mph in all speed bins. • The Speed Error Bias (SEB) was within specifications for all speed bins when compared with the Standard Error of the Mean (SEM) Band. I-95 Corridor Coalition Vehicle Probe Project Evaluation – MD Validation #11 - I-895 AND I-95 EXP Vendors: HERE, INRIX, TOMTOM 4 October, 2017 ES Table 4- TOMTOM Freeway Evaluation Summary for Maryland Average Absolute Speed Speed Error Bias Error (<10mph) (<5mph) Number of 5 Speed Bin Comparison Comparison Comparison
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