All Outputs (4)

Estimation of critical occupancy values for UK motorways from traffic loop detectors (2010)
Presentation / Conference
Al-Obaedi, J., & Yousif, S. (2010, June). Estimation of critical occupancy values for UK motorways from traffic loop detectors. Presented at Salford Postgraduate Annual Research Conference, The University of Salford, Salford, United Kingdom

Occupancy is the percent of time a traffic loop detector embedded in the road pavement is occupied by vehicles. This term is usually used as a substitution for the traffic density which is not feasible to obtain from detectors. One of the recent a... Read More about Estimation of critical occupancy values for UK motorways from traffic loop detectors.

Modelling ramp metering at motorway merges (2010)
Presentation / Conference
Al-Obaedi, J., & Yousif, S. (2010, May). Modelling ramp metering at motorway merges. Poster presented at Celebration of Research, Faculty of Science, Engineering & environment, University of Salford, Salford, Greater Manchester

Traffic congestion has increased rapidly in the past decades mainly due to a sharp increase in vehicles using the road networks. Recently, and to deal with motorway congestion, traffic signal devices (ramp metering) installed on motorway entrances w... Read More about Modelling ramp metering at motorway merges.

Partial elliptical two-regime speed-flow traffic model based on the highway capacity manual (2010)
Presentation / Conference
Yousif, S. (2010, January). Partial elliptical two-regime speed-flow traffic model based on the highway capacity manual. Presented at 9th International Postgraduate Research Conference in the Built and Human Environment, Salford, Greater Manchester

There have been several attempts to describe traffic flow behaviour by modelling the relationship between the main variables describing traffic such as speed, flow and density. Some of these models are based on simplistic assumptions and therefore,... Read More about Partial elliptical two-regime speed-flow traffic model based on the highway capacity manual.

Testing visual angle car following models using different sets of data (2010)
Presentation / Conference
Al-Obaedi, J., & Yousif, S. (2010, January). Testing visual angle car following models using different sets of data. Presented at Universities Transport Studies Group - 42nd Conference, University of Plymouth

The basic assumption in visual angle car following models is that the following distance between successive vehicles is a function of the object (i.e. leading vehicle) width. This paper examines the validity of this assumption using two types of dat... Read More about Testing visual angle car following models using different sets of data.