Evaluation of Ramp Metering Strategies in Greater Cairo
Salma Hussein Mohammed Abu-Bakr;
Abstract
ABSTRACT
Uncontrolled on-ramp merging section is considered as bottleneck sections that causes severe traffic congestions at several locations on urban expressways in Greater Cairo Region (GCR). Ramp metering control strategy, which aims to regulate the entry of on-ramp vehicles onto the mainline, has proved several benefits in improving the traffic performance and safety on many freeways and expressways around the world. However, no studies have been conducted to assess the impacts of implementing such strategy on GCR roads network. Accordingly, the aim of this thesis is to examine the effects of applying ramp metering control system on urban expressways in GCR.
Four on-ramp sites with different geometric configurations were selected along the 6th of October corridor and the 15th of May corridor as a case study. The evaluation process was conducted based on the microsimulation methodology by using Vissim software package. The developed simulation models were calibrated and validated by using the traffic data collected during peak hours at the selected sites. Two different control strategies were tested at each site: fixed-time ramp metering strategy and fixed-time ramp signals integrated with mainline signals. The both two strategies were compared to “no control” condition and evaluated based on three different performance measures; average speed, average vehicle delay, and on-ramp queue length.
Uncontrolled on-ramp merging section is considered as bottleneck sections that causes severe traffic congestions at several locations on urban expressways in Greater Cairo Region (GCR). Ramp metering control strategy, which aims to regulate the entry of on-ramp vehicles onto the mainline, has proved several benefits in improving the traffic performance and safety on many freeways and expressways around the world. However, no studies have been conducted to assess the impacts of implementing such strategy on GCR roads network. Accordingly, the aim of this thesis is to examine the effects of applying ramp metering control system on urban expressways in GCR.
Four on-ramp sites with different geometric configurations were selected along the 6th of October corridor and the 15th of May corridor as a case study. The evaluation process was conducted based on the microsimulation methodology by using Vissim software package. The developed simulation models were calibrated and validated by using the traffic data collected during peak hours at the selected sites. Two different control strategies were tested at each site: fixed-time ramp metering strategy and fixed-time ramp signals integrated with mainline signals. The both two strategies were compared to “no control” condition and evaluated based on three different performance measures; average speed, average vehicle delay, and on-ramp queue length.
Other data
| Title | Evaluation of Ramp Metering Strategies in Greater Cairo | Other Titles | تقييم تطبيق استراتيجيات التحكم في مداخل الكبارى في القاهرة الكبرى | Authors | Salma Hussein Mohammed Abu-Bakr | Issue Date | 2019 |
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