Method for Allocating Multitype Sensors on a Freeway Corridor with Existing Sensors

2017 ◽  
Vol 143 (11) ◽  
pp. 04017054
Author(s):  
Fengping Zhan ◽  
Jian Zhang ◽  
Xia Wan ◽  
Bin Ran
Keyword(s):  
Freeway Corridor

Optimum Volume of Freeway Corridors

2020 ◽  
Vol 2674 (3) ◽  
pp. 27-36
Author(s):  
Siavash Shojaat ◽  
Justin Geistefeldt ◽  
Brian Wolshon
Keyword(s):  
Quality Of Service ◽  
Real World ◽  
Flow Index ◽  
Traffic Demand ◽  
Probability Of Survival ◽  
Freeway Corridors ◽  
Freeway Corridor ◽  
Different Characteristics ◽  
Optimum Volume

Conventional methods to assess the quality of service on freeways are based on the comparison of a specific peak hour traffic demand to the capacity of the facility, which is usually measured at a single uniform bottleneck section. However, estimating the quality of service of one bottleneck section may not be sufficient to assess the performance of an entire freeway facility. A driver traveling along a freeway corridor may actually encounter multiple flow breakdowns at independent bottleneck sections, which affect the overall quality of service. This paper introduces a comprehensive approach that considers an entire freeway corridor as a system consisting of successive independent bottlenecks with different characteristics, and can be used to estimate the optimum sustainable volume. The methodology is based on the sustained flow index, which is defined as the product of traffic volume and the probability of survival at this volume. Optimum volumes of two real-world corridors are estimated based on the new derivations. The empirical results reveal that the optimum volume and the capacity of an entire corridor is less than those of its most restrictive bottleneck.

Validating the Adaptability of Travel Time Reliability Measurements using Probe Data

2019 ◽  
Vol 2673 (6) ◽  
pp. 57-67
Author(s):  
Zhuo Chen ◽  
Xiaoyue Cathy Liu ◽  
Grant Farnsworth ◽  
Kelly Burns
Keyword(s):  
Performance Evaluation ◽  
Travel Time ◽  
Cross Validation ◽  
Salt Lake ◽  
Salt Lake City ◽  
Travel Time Reliability ◽  
Statistical Probability ◽  
Lake City ◽  
Evaluation And Monitoring ◽  
Freeway Corridor

Travel time reliability (TTR) is considered a critical piece of information in highway performance evaluation. The L02 project from Strategic Highway Research Program 2 (SHRP2) has developed a holistic method using statistical probability functions of travel time as the TTR measure to build highway performance evaluation and monitoring systems. Compared with single-value reliability measures, the L02 measure is able to identify sources of unreliability and quantify their associated impacts. To validate the adaptability of L02 measure, TTR analysis on the I-15 freeway corridor in Salt Lake City, Utah using probe data has been conducted. The result is compared against output from the quadrant-based TTR measure that is currently used by the Utah Department of Transportation. Through cross-validation, it is determined that the two suites of measures demonstrate good consistency in relation to reliability assessment and unreliability source diagnoses. In addition, the study provides a method to calibrate the quadrant-based TTR measure, and new critical values were developed based on the cross-validation.

On‐Line Traffic Assignment for Optimal Freeway Corridor Control

1990 ◽  
Vol 116 (6) ◽  
pp. 744-755 ◽  
Author(s):  
Yorgos J. Stephanedes ◽  
lossif Z. Argiropoulos ◽  
Panos Michalopoulos
Keyword(s):  
Traffic Assignment ◽  
On Line ◽  
Freeway Corridor

Equal Access? Travel Behaviour Change in the Century Freeway Corridor, Los Angeles

Urban Studies ◽  
1999 ◽  
Vol 36 (3) ◽  
pp. 547-562 ◽  
Author(s):  
Drusilla van Hengel ◽  
Joseph DiMento ◽  
Sherry Ryan
Keyword(s):  
Los Angeles ◽  
Behaviour Change ◽  
Travel Behaviour ◽  
Equal Access ◽  
Freeway Corridor

Stochastic control of freeway corridor systems

1975 ◽  
Author(s):  
M. Athans ◽  
P. Houpt ◽  
D. Looze ◽  
D. Orlhac ◽  
S. Gershwin ◽  
...  
Keyword(s):  
Stochastic Control ◽  
Freeway Corridor

Robust Model for Estimating Freeway Dynamic Origin–Destination Matrix

2005 ◽  
Vol 1923 (1) ◽  
pp. 110-118
Author(s):  
Pei-Wei Lin ◽  
Gang-Len Chang
Keyword(s):  
Measurement Errors ◽  
Substantial Reduction ◽  
Model Parameters ◽  
Robust Model ◽  
Travel Time Distribution ◽  
Proposed Model ◽  
Time Origin ◽  
Freeway Corridor ◽  
Potential Use ◽  
Selection Of

This study presents a robust model for estimating the dynamic freeway origin–destination matrix with a measurable time series of ramp and mainline flows. The proposed model captures the speed variance among vehicles having the same departure time, origin, and destination with an embedded travel time distribution function that results in a substantial reduction in model parameters. With the developed solution algorithm, the proposed model offers the potential use in a network of realistic size such as the I-95 freeway corridor between the Maryland I-695 and I-495 beltways. Extensive numerical analyses with respect to the sensitivity of both input measurement errors and the selection of initial parameters have revealed that the proposed model is sufficiently robust for real-world applications.

Dynamic control and traffic performance in a freeway corridor: a simulation study

1991 ◽  
Vol 25 (5) ◽  
pp. 267-276 ◽  
Author(s):  
Robert A. Reiss ◽  
Nathan H. Gartner ◽  
Stephen L. Cohen
Keyword(s):  
Simulation Study ◽  
Dynamic Control ◽  
Traffic Performance ◽  
Freeway Corridor

Methods for Multi-Type Sensor Allocations Along a Freeway Corridor

2018 ◽  
Vol 10 (2) ◽  
pp. 134-149 ◽  
Author(s):  
Fengping Zhan ◽  
Xia Wan ◽  
Yang Cheng ◽  
Bin Ran
Keyword(s):  
Freeway Corridor
Sign in / Sign up

Export Citation Format

Share Document