Elvis L Duncan & Michael J. Snyder 
Managed Motorways [PDF ebook] 
Traffic Optimization and Road Pricing Approaches in Europe and Singapore

Finding cost-effective options to mitigate recurrent and non-recurrent congestion on freeway facilities is one of the most significant challenges State and regional transportation organizations face. Several countries are implementing managed motorway concepts to move higher traffic volumes on their highways more efficiently without acquiring more land and constructing large-scale infrastructure projects. This book explores managed motorway concepts and traffic optimization technologies being implemented in Europe and Singapore.