Commercial remote sensing & spatial information (CRS & SI) technologies program for reliable transportation systems planning : volume 1 - comparative evaluation of link-level travel time from different technologies and sources.
-
2015-03-01
Details:
-
Corporate Creators:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Geographical Coverage:
-
Corporate Publisher:
-
Abstract:Accurate travel time information is required to efficiently plan and effectively manage transportation network. Technologies and
private data sources such as INRIX, TomTom and HERE offer the potential to continuously collect travel time data and use it for
long-term transportation planning as well as real-time traffic condition monitoring. However, their ability to accurately collect
travel time data is still unclear. The first phase of this study focused on capturing and estimating link/section level travel times on
arterial streets and freeways using manual floating car method, Global Positioning System (GPS) floating car method, Bluetooth
detectors, and INRIX. A comparison between travel times collected manually and using various technologies / sources (GPS,
Bluetooth detectors and INRIX) was performed for each travel time run. Results showed that both Bluetooth detectors and
INRIX yield promising estimates for freeways. However, travel time data captured for arterial streets using Bluetooth detectors
are less accurate and not dependable when compared to other technologies. Moreover, data from Bluetooth detectors captured
using the vendor’s software showed a significant number of outliers. Therefore, the second phase focused on filtering raw
sample of Bluetooth detectors data, estimating travel time, and then comparing with manual travel time data to recommend
filtering and data capturing criteria. The effect of spacing between the Bluetooth detectors and signal cabinet controller location
(in which Bluetooth detector was placed) on the percent difference in travel time was examined. The role of on-network and
temporal characteristics on difference in travel time from GPS, Bluetooth detectors and INRIX (when compared to ground truth)
was also examined
-
Format:
-
Collection(s):
-
Main Document Checksum:
-
File Type:
Supporting Files
-
No Additional Files
More +