MTJ Roundabout Engineering - In Service Design Review

In-Service/Post-Construction Reviews

We have found that the designs of problematic roundabouts with excessive crashes often have less than optimal geometrics and confusing signing and/or pavement markings that lead to information processing challenges for drivers. MTJ’s review approach ensures that all design elements successfully work together as a unified whole to maximize driver comprehension and reduce confusion to mitigate crashes.

MTJ conducts post-construction/in-service inspections/safety audits to recommend and implement modifications to improve safety and operations. When providing In-Service Design Reviews, MTJ applies a comprehensive approach to identifying remedial enhancements to improve the safety and operational performance through increased driver comprehension, slower speed environment, and fewer conflict points.

Our recommended design modifications are anchored in human factors research and roadway, traffic, and roundabout-specific safety design principles. This approach forms the foundation of MTJ’s successful track record of improving safety and operations at roundabouts.

Field Construction Reviews

MTJ can provide inspection and guidance to field personnel before and during construction to ensure adherence to design plans, and recommend modifications as necessary.

In-Service Design Review projects include:

“Thank you! You have done an excellent job in documenting and sending memo of findings. It exceeded our expectations on timeline and schedule. Mark Melnychenko, our Transportation Director, and Phil Kercher thank you for all your effort on this project.” Kiran Guntupalli P.E. PTOE, Principal Traffic Engineer, City of Scottsdale

“A special thank you to Mark because the updates based on his designs and suggestions really helped “turn the tide.” His involvement has had a great positive impact on the project.” Eva D. Vargas, PE, AICP, Project Engineer, City of Cleveland Mayor’s Office of Capital Projects, E&C

“It's true - the devil is in the details. We have learned the critical importance of using a true subject-matter expert when it comes to delivering optimally operating roundabout intersection control. Going to a class, owning the software, and even designing many roundabouts are not equivalent to decades of studying the sensitive, operational fine points that separate average from optimally performing roundabouts. Mark Johnson is a unique specialist with an eye for finding the subtle design nuances that can make or break roundabout performance. Whether it is in the role of original designer or peer reviewer, we trust Mark and his team to bring the knowledge, experience, and input necessary to assure our roundabouts are delivered at the highest level.” Gregory P Muhonen, PE, Public Works Director, Town of Estes Park, CO

“It was wonderful working with you on this project and it was a pleasure working with you on a unique project such as this (Not too often we cut back lanes in a recently built roundabout). We don’t tend to build too many roundabouts, but when we do, I certainly will recommend they reach out to you for discussing future work. We greatly appreciate MTJ Engineering and the work provided on this project! I highly recommend MTJ!” Josh Potter, Transportation Engineer, Hennepin County Public Works – Design