If the transport sector is to make deep cuts to its carbon emissions, it is necessary to reduce the carbon-intensity of travel. Reducing travel itself, at some times and places, is sometimes justified but it is extremely unlikely that under expected global economic development patterns overall...

Cost data for the construction and operation of facilities are essential for the evaluation of infrastructure services supplied by private or public providers. This roundtable examines what data is needed for evaluation; which methods best measure the efficiency of service provision and...