The merging process in an Automated Highway System (AHS) is divided into a speed adjustment stage and a lane merging stage. Three important parameters, namely, acceptability, availability and pursuability, are analyzed to characterize the AHS lane gap features for the ideal, smooth and safe merging of the ramp vehicles. Three control guidance laws, namely, linear, optimal and parabolic speed pr...

A new model is proposed to characterize changes in traffic at transitions. These are affected by driver response. The distance headway between vehicles considered as it affects behavior. Driver response quick with a small and slow when the large. variations greater while smooth driver. developed which characterizes based on headway. This compared well-known widely employed Zhang PW models. tran...

Gap acceptance and rejection are important parameters in determining the capacity of stop sign intersections. Gaps are either accepted or rejected depending on a number of factors including head ways, volume of traffic, drivers' characteristics etc. From the results obtained, it was observed that the critical gaps varied very slightly from weekdays to weekends, 3.8 sees for weekdays and 4 1 see...

In this paper a realistic cellular automata model is proposed to simulate traffic flow at single-lane roundabouts. The proposed model is built on fine grid Cellular Automata (CA), so it is able to simulate actual traffic flow more realistically. Several important novel features are employed in our model. Firstly, 1.5-second rule is used for the headway (=distance /speed) in carfollowing process...

and follow-up headway values based on a comprehensive evaluation of roundabouts throughout the United States. The recommended operational models by NCHRP 3-65 will be incorporated into the next update of the Highway Capacity Manual (HCM). Although this NCHRP study contains a significant amount of data (including more than 500 h of video at various roundabout locations), the data do not include ...

A time-headway model is presented to mimic bus behavior on the bus route. The motion of a bus is described in terms of the time headway between its bus and the bus in front. We study the bunching behavior of buses induced by interacting with other buses and passengers. It is shown that the dynamical phase transitions among the inhomogeneous bunching phase, the homogeneous free phase, the coexis...

Ahmad, Shaikh.M.S.C.E.,Purdue University, December 2014.Capacity-Related Driver Behavior on Modern Roundabouts Built on High-Speed Roads. Major Professor: Andrew Tarko. The objective of this thesis was to investigate the factors that affect capacity-related driver behavior on modern roundabouts built on high-speed roads. The capacity of roundabouts is strongly affected by the behavior of driver...

A significant portion of the observed variability in roadway performance can be due to the difference and innate heterogeneity in drivers’ behaviour. Analytical models, stated preference data collection and studies, and laboratory-based simulator experiments are developed to understand the driver behaviour for years. However, little has been done to fill the important gap between the survey/lab...

Over the past decade, a number of manuals have been developed for rural road roundabouts in Russian Federation. However, two- and three-lane are designed operated cities Federation do not yet that take into account specific features this urban intersections. The development such involves defining all multi-lane roundabout characteristics which used consistent calculations capacity, traffic dela...