MTJ Roundabout Consulting
Your Trusted Resource
Welcome to Our Updated Website!
We've redesigned our site to highlight our specialized roundabout-focused services and how we support project teams in achieving successful outcomes. Please explore our services, resources, and project examples to help your team deliver effective roundabout solutions.
About MTJ Roundabout Consulting
Founded in 2005, MTJ Roundabout Consulting plays a unique, specialized role in the transportation industry. It partners with project teams to seamlessly integrate roundabouts into multimodal transportation solutions.
As a small, highly focused firm, we bring deep expertise in multimodal traffic design, ensuring that roundabouts enhance safety, efficiency, and connectivity within transportation networks. Our specialized approach has been crucial to project success, helping teams transform planning objectives into real-world solutions that balance all modes of transportation.
Roundabout Design for Safer, Smarter Mobility
For over 30 years, MTJ’s Mark T. Johnson, PE, has been at the forefront of roundabout design, bridging the gap between planning goals and transportation engineering. His expertise lies in collaborating with project teams to transform visionary ideas into practical, real-world solutions that enhance safety, mobility, and connectivity. By incorporating innovative roundabout designs, we ensure efficient traffic flow, improved multimodal integration, and safety.
A Collaborative Approach for Better Results
At MTJ, we believe that successful transportation solutions are built on collaboration and informed decision-making. Mark’s ability to build consensus on key design issues enhances project efficiency and confidence. His teamwork-driven approach fosters knowledge transfer, empowering project teams to implement effective roundabout solutions with clarity and confidence.
Why Add MTJ to Your Project Team?
✅ Trusted Expertise – A highly experienced technical expert ensures innovative, consistent, and successful roundabout applications.
✅ Innovative Roundabout Design – Enhancing multi-modal safety, reducing congestion, and optimizing traffic flow.
✅ Multimodal Integration – Supporting pedestrians, cyclists, and transit users in a connected system.
✅ Seamless Collaboration – High-value, cost-effective services tailored to your project’s needs.
✅ Clear & Effective Communication – Consensus building, knowledge sharing, and informed decision-making.
Let’s shape the future of mobility—together.
FEATURED PROJECTS
La Quinta Village Corridor | La Quinta, CA
The Village of La Quinta launched a Complete Streets project that included a series of 5 roundabouts.
66th Ave. & Portland Ave. | Richfield, MN
MTJ was hired to improve driver comprehension to reduce specific crash types.
SR 161 & Cosgray Rd. | Dublin, OH
The City of Dublin, OH, needed design improvements to optimize safety for all modes, accommodate large trucks, and meet the intersection's long-range operational requirements while minimizing adverse impacts on the existing and proposed adjacent properties. MTJ, working with prime partner firm GHD Inc. MTJ, provided analysis and horizontal geometric design optimization, along with signing and signing oversight for this successful project.
Main St. & Century Ave. | Waunakee, WI
The Village of Waunakee wanted to maintain a two-lane roadway through their historic downtown.
California Blvd & 1st St. / 2nd St. | Napa, CA
MTJ Roundabout Engineering provided roundabout capacity analysis, horizontal design optimization, signing and pavement marking recommendations, and visualizations for this project as a member of the consulting team led by Omni-Means.
SR 99 / SR 104 / Twin Cities Rd. | Galt, CA
This interchange was over 50 years old and needed replacement, but reconstruction was still decades away. The MTJ/Omni-Means team developed a cost-effective and timely solution that included two closely spaced roundabouts and a new freeway on-ramp to replace the existing congested signalized intersection.
Search for a recent project by using a keyword, i.e., city, state, highway, or street name!
TESTIMONIALS
Integrated Design – Whether through Review or Direct Design, we ensure horizontal design, signage, and pavement markings work seamlessly to maximize driver comprehension and safety for all modes.
Proven Impact – Our project partners highlight the benefits of MTJ services in enhancing their project outcomes.
Quotes from Project Partners
“The RCOC has engaged MTJ 's roundabout-specific operational analysis, concept development, and final horizontal geometric services, a partnership that has lasted nearly 20 years.
Working with MTJ has been instrumental in the timely resolution of strategic decision-making issues, allowing for both time and cost savings in design schedule and, notably, construction costs with reduced adverse impacts. We highly recommend MTJ’s services”
Jeff Obrien, PE | Design Head / RCOC/Road Commission for Oakland Co., MI
“Thank you! MTJ’s documentation of design review findings and optimized design recommendations and his collaborative communications exceeded our expectations. Mark met our very tight schedule for this high-profile development-led project. Myself, 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 AZ
“A special thank you to Mark because the updates based on his design recommendations helped “turn the tide, internally and externally. Your 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
"We have learned the importance of using a true subject-matter expert for our roundabout projects.
Mark Johnson is a unique specialist with an eye for the subtle design nuances that can make or break roundabout performance and safety.
Whether he provides direct design or peer review, we trust Mark to bring the knowledge, experience, and input necessary to ensure our roundabouts are delivered at the highest level.”
Greg Muhonen, PE | Public Works Director | Town of Estes Park, CO
"In addition to providing design input and conducting peer reviews, critical for any well-designed roundabout, Mark thoroughly understands the 'how and why’ of roundabouts and can effectively communicate this understanding to both plan reviewers and the general public."
Ron Boyle, PE
GHD, Senior Project Manager
