Roadway Measurement System Evaluation (2011) / Chapter Skim
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From page 11... ...
This furtherreduced data elements list is shown in Table 4.1. The research team analyzed the rodeo results during the Task 7 data analysis to determine which teams could most likely provide SHRP 2 with the desired data elements to be collected under the S04B project.
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) , wooden post, N/A, other Impact attenuator, buried end, terminal end, fist, bridge connection, none, other Impact attenuator, buried end, terminal end, fist, bridge connection, none, other GPS coordinates of the start of on-street parking GPS coordinates of the end of on-street parking Left, right, both GPS coordinates of start of pavement marking GPS coordinates of end of pavement marking Centerline; lane lines (skips)
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sub-1 m 100% sub-1 m sub-1 m ±1 in. sub-1 m sub-1 m 100% 100% sub-2m 100% 100% sub-1 m Rodeo CTRE Best Target Desired Achieved Recommended Feature Data Element Definition Accuracy Accuracy Accuracy Accuracy Assets Roadside Obstacles Rumble Strips Sidewalk Signs Street Lighting Pavement Markings (continued)
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Yes/no Yes/no None, signalized, stop, yield Standard, protected left-turn, permitted turn Yes/no GPS coordinates of signal head Two-way, three-way, all-way stop control Yes/no (Flashing yellow/red beacon) 100% 100% ±3 ft 100% 100% 100% ±2 ft 100% ±2 ft 100% 100% 100% 100% 100% ±3 ft 100% 100% 100% 100% ±3 ft 100% 100% 100% ±2 ft 100% ±2 ft 100% 100% 100% 100% 100% ±3 ft 100% 100% 77% 70% sub-2m 77% 77% 67% 5 ft 67% -108.76 ft 30% 77% 77% 57% 50% N/A 77% 70% 100% 100% sub-1 m 100% 100% 100% ±2 ft 100% ±2 ft 100% 100% 100% 100% 100% sub-1 m 100% 100% Rodeo CTRE Best Target Desired Achieved Recommended Feature Data Element Definition Accuracy Accuracy Accuracy Accuracy (continued on next page)
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Bridges Approaches Driveways Lanes Median Rail Crossings Bridge begin location Bridge end location Bridge rail exists Offset of bridge rail Driveway location Driveway type Number of lanes Lane widths Location of measurement Lane add point Lane drop point Special lane function type Median type Location of measurement Median width At-grade railroad crossing location Number of tracks Railroad crossing control type GPS coordinates of where the bridge parapet or rail begins. GPS coordinates of where the bridge parapet or rail ends Yes/no From edge of lane to nearest face of rail/parapet (ft)
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±25 ft (7.62 m) Rodeo CTRE Best Target Desired Achieved Recommended Feature Data Element Definition Accuracy Accuracy Accuracy Accuracy Roadway Inventory Rail Crossings (continued)
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From page 17... ...
Intersections The intersection attributes contained in the data elements list (Table 3.1) can be obtained from the digital right-of-way images using semiautomated data analysis methods similar to those used for recording the roadway assets and features discussed.
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SHRP 2 Report S2-S01E-RW-1: Evaluation of Data Needs, Crash Surrogates, and Analysis Methods to Address Lane Departure Research Questions Using Naturalistic Driving Study Data. Transportation Research Board of the National Academies, Washington, D.C., forthcoming.
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