Impact of a Dedicated Lane on the Capacity and the Level of Service of an Urban Motorway

The impact of managed lanes on motorway capacity is an increasing topic of interest. A trial of a dedicated lane on an urban motorway is described in this paper. The assessment of the operation is carried out ex post, based on a before after comparison between the do noting case and the new implemented scheme. When the dedicated lane is implemented, capacity remains stable upstream and downstream. The level of service is significantly degraded upstream and slightly improved downstream. The length of the recurring morning peak increases. Other changes concerning travel time and traffic volumes are also analyzed.