Performance-Based Intersection and Interchange Design

RPA provides intersection design services and interchange solutions that improve traffic flow, reduce conflicts, and create smoother, more predictable travel experiences for all roadway users. Our engineers bring together technical expertise and practical insight to identify design priorities, anticipate challenges, and deliver cost-effective solutions that meet agency goals and community needs.

We use tailor-made alternatives analysis processes to evaluate a full range of design options. From traffic signal optimization and geometric refinements to modern roundabouts and innovative roadway intersection layouts, our team applies advanced analysis and modeling tools to assess safety, capacity, and cost. This data-driven approach ensures that every alternative is tested thoroughly and that clients can make confident, well-informed design decisions.

RPA designed the first roundabout on Montana’s Interstate system and has since completed dozens of intersection and roundabout projects statewide. Our designers and traffic engineers combine proven engineering methods with forward-thinking design to create intersections and interchanges that enhance mobility, improve reliability, and strengthen the overall performance of the transportation network. Each project reflects RPA’s commitment to practical innovation and to delivering lasting value through every transportation solution we design.