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Third-Party Data Fusion to Estimate Freeway Performance Measures
Transportation Research Record: Journal of the Transportation Research Board ( IF 1.7 ) Pub Date : 2021-07-22 , DOI: 10.1177/03611981211024240
Sakib Mahmud Khan 1 , Anthony David Patire 1
Affiliation  

Transportation agencies monitor freeway performance using various measures such as VMT (vehicle-miles traveled), VHD (vehicle-hours of delay), and VHT (vehicle-hours traveled). They typically rely on data from point detectors to estimate these freeway performance measures. Point detectors such as inductive loops cannot capture the travel time for a corridor, leading to inaccurate performance measure estimation. This research develops a hybrid method, which estimates freeway performance measures using a mix of probe vehicle data provided by third-party vendors and data from traditional point detectors. Using a simulated model of a freeway (Interstate-210), the overall framework using multiple data sources is evaluated and compared with the traditional point detector-based estimation method. In the traditional method, point speeds are estimated with the flow and occupancy values using g-factors. Data from 5% of the total vehicles are used to generate the third-party provided travel time data. The analysis is conducted for multiple scenarios, including peak and off-peak periods. Results suggest that fusing probe vehicle data from third-party vendors with data from point detectors can help transportation agencies estimate performance measures better than the traditional method, in scenarios that have noticeable traffic demand on freeways.



中文翻译:

第三方数据融合以估算高速公路性能指标

运输机构使用各种措施来监控高速公路的性能,例如 VMT(行驶的车辆英里数)、VHD(延迟的车辆小时数)和 VHT(行驶的车辆小时数)。他们通常依靠点检测器的数据来估计这些高速公路性能指标。感应回路等点检测器无法捕获走廊的行程时间,从而导致性能度量估计不准确。该研究开发了一种混合方法,该方法使用第三方供应商提供的探测车辆数据和来自传统点检测器的数据的混合来估计高速公路性能指标。使用高速公路(Interstate-210)的模拟模型,评估使用多个数据源的整体框架,并与传统的基于点检测器的估计方法进行比较。在传统方法中,点速度通过使用 g 因子的流量和占用率值进行估计。来自总车辆的 5% 的数据用于生成第三方提供的旅行时间数据。分析针对多种场景进行,包括高峰期和非高峰期。结果表明,在高速公路上有明显交通需求的场景中,将来自第三方供应商的探测车辆数据与来自点检测器的数据相融合,可以帮助交通机构比传统方法更好地估计性能指标。

更新日期:2021-07-22
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