Authors: Gang-Len Chang, Hua Xiang & Chi-Sheng Chou
Date: June 2004
Abstract:
This study has investigated the interrelations between crash rates, signal yellow times, driver characteristics and vehicle performance characteristics at signalized intersections, based on field observations of 732 drivers at nine intersections across five counties in Maryland. It has been found that driver responses during the yellow signal phase can be classified into four distinct types: “aggressive pass,” “conservative stop,” “normal stop,” and “normal pass.” Their response differences are due not only to discrepancies in individual characteristics, but also a variety of traffic environmental factors. The collective impacts of such factors have been evaluated with an ordered-probit model. In addition, based on the speed evolution data recorded from each observed driver, this study further analyzed the deceleration/ acceleration rates of drivers responding to yellow-light phases. Such information provides valuable data for computing the distribution of intersection dilemma zones under various types of driving populations and vehicle types.

Download (MD-04-SP308B4L-Dilemma-Zone-Warning-System-Phase-I-Report.pdf)

Download (Jinshan_report_1.pdf)

Download (HWHo_Report_4.pdf)

Abstract:
Road pricing has widely been considered by system planners for relieving congestion and generating revenue. The design and evaluation of different road pricing schemes are always necessary for the decision makers to ensure the potential beneficiary of road pricing and the practical implementation of the scheme. This study presents an evaluation procedure based on the use of continuum modeling approach for addressing the road pricing feasibility problem in Baltimore Metropolitan Region. In this study, Baltimore City is considered as the central business district (CBD) and the corresponding user-equilibrium, system-optimal and cordon-based charging models are setup and solved. Sensitivity analyses of total demand, total toll collected, social benefit and the location/shape of the charging cordons for this proposed model with respect to the input parameters are also completed. The study demonstrates the potential applicability of using continuum modeling approach for road pricing feasibility study in Baltimore Metropolitan Region.

Download (HWHo_Report_1.pdf)

Author: Gang-Len Chang & Zhuan Li
Date: June 2010

Download (GLC-Offramp-Report-CITSM.pdf)

Authors: Xianfeng Yang , Yang Lu & Gang-Len Chang
Date: March 2011

Download (Final-UAID_Revised-5_1.pdf)

Authors: Gang-Len Chang, Ying Liu , Ali Haghani ,  Abbas M. Asshar

Date: June 2007

Download (FFF-Final-Version.pdf)

Author: Elham Sharifi
Date: 2008

Download (ElhamSharifi_Report_2.pdf)

Download (DLM_reportPart1.pdf)