Estimation of Freeway Work Zone Capacity Using Simulation andField Data

The objective of this research was to develop analytical models and procedures for estimating the capacity of a freeway work zone considering various geometric, traffic, and work zone related parameters. The study was conducted in two stages: simulation-based modeling, and field data collection. In the first stage, CORSIM (Version 5.1) was used to develop a comprehensive database for various work zone scenarios. Analytical models were developed to predict work zone capacity based on these simulated data and previous literature findings, considering three work zone configurations: 2-to-1, 3-to-2, and 3-to-1 lane closures. In the second stage, field data were collected at a freeway work zone to evaluate and refine the analytical models developed. Data were collected at the freeway work zone site during 15 evening peak periods, which included left- and right-lane closures, as well as rainy weather conditions. The observed capacities were compared to those predicted by the new analytical models as well as those estimated by the HCM 2000. It was concluded that the analytical models developed predicted within one percent the capacity of the study work zone

Impact of Trucks on Arterial LOS and Freeway Work Zone Capacity Part B:Freeway Work Zone Capacity

The existing FDOT lane closure analysis method was developed several years ago, and it is the desire of the Department to evaluate and update it accordingly. The objective of this research was to develop analytical models and procedures for estimating the capacity of a freeway work zone considering various geometric and traffic parameters. Due to the Unavailability of real-world work zone data, the study was based on simulation. CORSIM (version 5.1) was used to develop a comprehensive database which was used in the analytical model development. Models were developed for three types of work zone configurations (2-to-1, 3-to-2, and 3-to-1 lane closures). Two different types of models were developed for each lane closure configuration; a planning model and an operational model. The Planning model is the simplest once and it applies when a capacity estimate is required, but the work zone is not in place. The operational model requires more data as input, and it may be used for estimating the capacity of an existing work zone

Impact of Trucks on Arterial LOS and Freeway Work Zone Capacity (Part B)

The existing Florida Department of transportation (FDOT) lane closure analysis method was developed several years ago, and it is the desire of the FDOT to evaluate and update it. The objective of this research was to develop analytical models and procedures for estimating the capacity of a freeway work zone considering various parameters. Due to unavailability of real-world work zone data, the study was based on simulation. CORSIM (version 5.1) was used to develop a comprehensive database which was used in the analytical model development. Models were developed for three types of work zone configurations (2-to-1, 3-to-2, and 3-to-1 lane closures). Two different types of models were developed for each configuration; a planning model and an operational model. The planning model is the simplest one and it can be applied when the work zone is not in place. The operational model requires more data as input, and should be used for estimating the capacity of an existing work zone. Since this research was entirely based on simulation, the results and conclusions should be viewed with caution. It is likely that field observations would result in different capacity values and that additional factors (such as time of day, etc.) would affect the results

Estimating exact hedonic indexes: An application to UK television sets

hedonic, quality-adjusted prices, consumer price indices, television sets, C21, C43, D12, L63,