The functional performances of conventional roundabouts (single-lane and multi-lane) and innovative roundabouts (spiral, flower, C and turbo) can be improved through right-turn bypass lanes controlled by stop, yield or free-flow signs. The article presents evaluations of the emissions of air pollutants (carbon dioxide, nitrogen oxides, particle pollution (PM10 and PM2.5)), fuel consumption and ...

This research is dedicated to the study of dynamics vehicles moving through additional entry lanes a roundabout. Using data created on base that model constant coefficients sixth-degree polynomial function, previously proposed by us, have been found. In result this there were obtained two analytic equations vehicles’ movement, where one them presented with positive sign leading coefficient and ...

The expansion of roads and the development of new road infrastructures have increased in recent years, linked to the population growing in large cities. In the last two decades, roundabouts have largely replaced traditional intersections in many countries. They have the advantage of allowing drivers continuous flow when traffic is clear, without the usual delay caused by traffic lights. Althoug...

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 dela...

Current capacity manuals do not allow comprehensively evaluating negative effects on lane caused by undisciplined vehicle movements and utilization, such as failure to obey distance rules, blockage roadside parking effect, formation of an extra using in the emergency lane, etc., which are mostly observed undeveloped developing countries. Irregularities traffic flow utilization result decreased ...

The construction of turbo-roundabouts is an increasingly frequent choice when it comes to improving flow capacity and traffic safety at road intersections. existing design guidelines, as a rule, give parameters for with approaches set right angles each other. article presents turbo-roundabout methods, taking into account swept path analyses the chosen vehicles approach legs are curvilinear orie...

The objective of the project was to identify design elements of roundabouts that could be problematic to older drivers with a specific focus on traffic control measures. It introduces a new approach to the evaluation and pretesting of traffic control features through the use of video footage and animated videos. Focus groups formed the first phase of the project, and structured interviews the s...