![]() ![]() Studies and research in United States and in other counties will be considered for this purpose. The objective of the study is to focus on trucking activity at roundabouts in United States, identify various issues along with gathering and synthesizing their countermeasures. This synthesis can be useful to researchers, designers, planners, and decision makers to gather information needed relating to roundabouts in the context of trucks or oversized trucks. This study attempts to synthesize the trucks operation, trucks and oversized trucks accommodation, safety concerns and countermeasures, and truck driver perspectives of trucks using roundabouts. There has been significant research about roundabout safety and operation performance however, there are only very few studies addressing various concerns of trucks using roundabouts in different studies or reports. While roundabouts have been operationally very effective for regular traffic and trucks, specific issues have been identified for trucks using roundabouts including accommodation issues, safety issues, design issues, etc. While roundabouts have been operational in other countries for many years, their existence and operations in United States have only began in the recent past and they are growing at an accelerated rate. Some of the advantages of roundabouts over other type of intersection control include: increased safety performance, decreased vehicle delays and queue lengths, better speed management at intersections, and better aesthetic appearance with possibility for community enhancement features. Further, studies conducted have proved that roundabouts are comfortable to be traversed for trucks, and access to businesses has not impacted much with the presence of roundabouts. Several studies conducted have concluded that implementing roundabouts as intersection control have reduced all traffic crashes by 40%, and injury crashes by 80%. Roundabouts have been proved to be the safe and efficient form of intersection control. This synthesis can be useful o researchers, designers, planners, and decision makers to determine effective ways to address specific trucking related issues at a roundabout. This study attempts to synthesize the research and knowledge of truck accommodation at roundabouts by synthesizing various research studies, reports, and articles various subject areas such as roundabout designs for trucking activity, roundabout designs and accommodation strategies for specialized trucking activity such as oversized trucks, truck safety at roundabouts, and motor carrier perspective of trucking at roundabouts have been analyzed and relevant knowledge has been synthesized. While there are not significant literatures and studies in this subject, there are few studies/reports spread out which address various issues in this subject area. Therefore, there is a great need for an informational guide in the form of synthesis report for roundabout designs specific to unique trucking traffic activity. Roundabouts in the context of regularly expected truck configuration have also been successful for effective roundabout designs however, there are always some site specific issues for trucks accommodation at roundabouts. Roundabouts in United States and other countries have been proved to be very successful, effective, and a safe traffic control treatment. ![]()
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