In traffic operations, the aim of transportation agencies and researchers is typically to reduce congestion improve safety. To attain these goals, need continuous accurate information about situation. Level-of-Service (LOS) a beneficial index operations used monitor freeways. The Highway Capacity Manual (HCM) provides analytical methods assess LOS based on density highway characteristics. Gener...

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...

We develop a macroscopic model for mixed urban and freeway traffic networks that is particularly suited for control purposes. In particular, we use an extended version of the METANET traffic flow model to describe the evolution of the traffic flows in the freeway part of the network. For the urban network we propose a new model that is based on the Kashani model. Furthermore, we also describe t...

Single carriageway multilane roads are not, in general, a very safe type of road, mainly because of the high number of seriously injured victims in head-on collisions, when compared with dual carriageway multilane roads, with a median barrier. In this paper the results of a study on the effect of the application of several low cost engineering measures, aimed at road infrastructure correction a...

In this study, we discuss the derivation, applications and the necessity of the traffic dispersion model, which is a nonlinear Poisson equation. Also, the analyses are presented in the content. The model is derived from the interaction among vehicles on a road. Therefore, the traffic pressure can be described by the model and the relation between density and the traffic pressure, which is trans...

1 This dissertation presents a vehicle reidentification algorithm for consecutive detector stations on a freeway, whereby a vehicle measurement made at a downstream detector station is matched with the vehicle's corresponding measurement at an upstream station. The algorithm should improve freeway surveillance by measuring the actual vehicle travel times; these are simply the differences in the...

it is a serious point to put sustainability into effect with the intention of healthy environment. health, according to the united nation development program (undp) is one of the important indicators which shows development level in each country. health is extremely meaningful and is associated with a great part of urban and regional planning policies as a main aspiration. it also contains many...

Crash prediction models still constitute one of the primary tools for estimating traffic safety. These statistical models play a vital role in various types of safety studies. With a few exceptions, they have often been employed to estimate the number of crashes per unit of time for an entire highway segment or intersection, without distinguishing the influence different sub-groups have on cras...