CRITICAL INTERVALS AND QUEUE INTERVALS AT TWO-LANE ROUNDABOUTS

Over the past decade, a number of manuals have been developed for rural road roundabouts in Russian Federation. However, two- and three-lane are designed operated cities Federation do not yet that take into account specific features this urban intersections. The development such involves defining all multi-lane roundabout characteristics which used consistent calculations capacity, traffic delays queue length. objective study is to develop methodology capacity estimation. At stage, was done determine values critical headway follow-up time two-lane roundabouts. Research methodology. Video rings were received from city Bratsk, Petrozavodsk, Pskov. headways measured between front bumpers cars, recorded on each lane circular roadway. Accepted rejected highlighted, as well vehicles using accepted headway. Critical determined linear regression models. Study Result. It found left right entry lanes different values. These results proved validity calculation methods based separate consideration lane. Objectives further research. Further research will focus estimation also necessary establish influence volumes distribution carriage way. Consistent solving mentioned above tasks allow form an multilane Key words: roundabouts, conflict points, headway, time, analysis.