Uppskattning av fördröjning och avgasutsläpp i fyrvägskorsningar med olika regleringsformer speciellt fyrvägsstopp = Estimation of delays and emissions at four-way junctions with different forms of regulation, principally four-way mandatory stop....

The bulletin reports an estimation of emissions and delays at four-way junctions with different types of regulation: mandatory stop on two approaches, mandatory stop on four approaches and traffic signals. Variables such as incoming traffic flow, traffic distribution on the primary and secondary road and the proportion of turning vehicles have been varied. The delay at a junction with mandatory stop on all approaches has been estimated to be of the same order of size as the delay at a junction regulated by signals, i.e. up to twice as long as in the case of mandatory stop on two approaches. Emissions are lowest at a junction with mandatory stop on two approaches. With traffic signals, emissions increase by 5-10% and with mandatory stop on all approaches the increase is 10-20%. The difference in emissions increases when either the proportion of turning vehicles decreases or the distribution of the traffic on the intersecting roads in uneven. (A)