Methodologies for modeling ramp driver acceleration-deceleration and gap acceptance behavior during freeway merge maneuvers are presented. This study serves an important purpose by pointing to the limitations of current freeway merge models which treat the ramp driver acceleration-deceleration and gap acceptance behavior as deterministic phenomena. In addition, the interdependence of freeway me...

In the near future, autonomous vehicles (AVs) will travel sharing current freeways with human driven vehicles. The efficiency of this mixed traffic scenario depend on ability AVs to behave cooperatively. Otherwise, introduction uncoordinated might lead capacity reductions. Connected (CAVs) traveling in platoons represents a promising management strategy get most from AVs’ technological revoluti...

T he 1985 Highway Capacity Manual (HCM) introduces new concepts of capacity and level of sarvice that are, in some cases, radically different from those used in previous editions of the HCM.’ A previous article has presented and discussed these basic concepts and their implication on interpreting capacity analysis results.’ This article focuses on the three primary examples of markedly differen...

ITE JOURNAL ON THE WEB / MAY 1999 OVER THE PAST DECADES traffic volumes have been steadily increasing throughout the United States causing more congestion and compromising safety. Highway incidents can cause significant disruption to traffic flows, and their adverse effects are usually widespread. The long delays usually experienced as a result of these incidents reduce productivity and increas...

many studies have been conducted focusing on the effects of friction coefficient or texture depth on the highway accident risk. however, combined effects of these parameters have not been still addressed. in this research the interaction between friction coefficient, texture depth and accident rate in 30 freeway sections were examined. the accident data were gathered and an apparatus was design...

Transportation Research Record: Journal of the Transportation Research Board, No. 2278, Transportation Research Board of the National Academies, Washington, D.C., 2012, pp. 1–12. DOI: 10.3141/2278-01 Z. Z. Tian, Department of Civil and Environmental Engineering, University of Nevada, Reno, MS 0258, Reno, NV 89557. N. Wu, Institute for Traffic Engineering, Ruhr University Bochum, 44801 Bochum, G...

We develop an anticipative model-based predictive traffic control approach for ramp metering in freeway traffic networks. If ramp metering is implemented in a freeway network with alternative routes, traffic can spontaneously re-route due to the response of the drivers to the applied control actions. Although spontaneous re-routing can have a significant influence on the resulting traffic situa...

We investigate the stability of a nonlinear (piecewise linear and possibly discontinuous) model of a freeway onramp, controlled by two popular onramp metering schemes: Alinea and Percent-Occupancy. The freeway model is based on Daganzo’s cell-transmission model and can be understood as a hybrid system switching among several discrete-time linear dynamic equations. It is shown, under conditions ...

This paper examines the conditions for which ramp metering can be bene®cial to the overall system in terms of travel time savings for a simple trac corridor that consists of a freeway and a set of parallel arterials connected by entrance ramps. The focus is on analyzing state and control relationships to arrive at general analytical results regarding optimal metering policies, rather than on e...