Abstract: This study is to evaluate the simulation-based and analytical-based methods for determining the left-turn lane queue storage length and deceleration length. Four traffic models were selected to estimate left-turn queue ...

Abstract: The ability to predict freeway accident likelihood promises significant benefits to freeway operations. However, the development of such prediction models has proven to be very challenging because of the random nature of ...

Abstract: Even though the MOBILE5 model has been widely used in air-quality analysis, it cannot be used in the evaluation of transportation improvements that result in a reduction of vehicle acceleration or deceleration. In this ...

Abstract: The purpose of this study is to incorporate the correlation between different types of emissions into microscale vehicle emissions models. Simultaneous equations models were calibrated for two vehicle categories classified ...