RT Generic A1 Poole, Jr., Robert W. T1 When Should We Provide Separate Auto and Truck Roadways? JF OECD/ITF Joint Transport Research Centre Discussion Papers YR 2009 FD Dec 01 AB The concept of the general purpose (GP) lane has dominated modern highway thinking and practice in OECD countries, especially for limited-access highways such as inter-city motorways and urban expressways, whether tolled or non-tolled. This paper raises the question of whether, in some circumstances, specialized lanes for light vehicles (cars, vans and pickup trucks) and heavy vehicles (generally more than two axles) might be cost-effective. PB Organisation for Economic Co-operation and Development DO 10.1787/5kmmncchk1zv-en UL http://www.oecd-ilibrary.org/;jsessionid=e6teo4gt0c3oe.x-oecd-live-02content/workingpaper/5kmmncchk1zv-en