Abstract :The increase in traffic volumes at intersections is one of the important problems thatmakes difficulties in the traffic operation management and movement then leads to trafficcongestion in these facilities.Capacity and level of service are important considerations and control points for theanalysis of intersections and evaluate the operation of the intersection.The present paper is dealing with the objectives of the evaluation of the capacity and thelevel of service at Al-Mat'haf square in Baghdad City, and development of alternativeimprovement strategies to overcome the traffic operation problems and to present a bestproposal to enhance the performance from the capacity point of view.To achieve these objectives, the traffic volumes data collection and geometric layout forAl-Mat'haf square that required for the traffic and geometrical analysis were gatheredmanually, while SIDRA traffic program is used for the requirements of traffic analysisprocess.It has been concluded that, fly over connect the direction arrived from Al-Tajneedintersection towards Damascus square is the best proposal to improve the capacity andtraffic operation ability of Al-Mat'haf squareKeywordsTraffic Capacity, Traffic Operation, Level of Service (LOS), Saturation Flow
Multilane highways typically are located in suburban communities, leading into central cities, or along high-volume rural corridors connecting two cities or significant activities that generate a substantial number of daily trips. The objectives of the present study include the analysis, and evaluation the level of service (LOS) on section for multilane highway in Ramadi city. The LOS multilane highway is based on density, which is calculated by dividing per lane flow by speed. The required traffic and geometrical data has been collected through field surveys on the section for multilane highway. Traffic volume data were collected manually and classified by vehicles types during each 15 minute interval. Highway Capacity Software 2000 (HCS 2000) program is used for the requirements of traffic analysis process to determine the level of service. It has concluded that the level of service on selected section for east bound is (A), and for west bound is (B).
Abstract :The intersections "roundabout" is an important part of the highway system. Theoperational efficiency, capacity, safety and cost of the system depend largely upon itsdesign of intersection "roundabout", especially in urban areas.The objectives of the present study include the analysis, evaluation and improvement theoperation traffic of selected roundabout (Kahtan Square) in Baghdad city by analysis anduse many alternatives to improve the roundabout (Kahtan Square) operation under localexist conditions and to present a best proposal to enhance the performance at the requiredfacility.To achieve these objectives, the traffic volumes data collection and geometric layout forKahtan square that required for the traffic and geometrical analysis were gatheredmanually, while SIDRA traffic program is used for the requirements of traffic analysisprocess.It has been concluded that, fly over at the main path of traffic movement at kahtan square(Baya'a – Yarmok hospital) is the best proposal to improve the capacity and trafficoperation for kahtan square.Keywords: Traffic operation, Round about, Level of service, Capacity