Transportation Design Projects Interwest Consulting Group

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Transportation Design Projects


College Avenue (US 287) / Harmony Road Intersection
Fort Collins, Colorado

Interwest created the conceptual, preliminary and final design plans for roadway widening and improvements to the busy intersection of two major arterial roadways. This extremely complicated, yet very successful, project included coordination with the City and CDOT regarding CDOT right-of-way plans, drainage design requiring new stormwater separators, extensive pothole coordination and documentation, structural engineering services to support Urban Design features, aggressive schedule demands and a complex construction phasing schedule due to the high volumes of traffic on both roads. A great deal of coordination and communication was also required with the adjacent property owners affected by the intersection design and construction.

Neighborhood Livability (Speed Control) Program

Eastman Park Drive / 3rd Street Roundabout
Windsor, Colorado

Interwest provided the design for this roundabout which replaced an existing two-way stop intersection in the Town of Windsor. The roundabout improved intersection safety and provided a distinctive visual entry into the adjacent Water Valley development. The design was sensitive to the Town’s available construction budget and the need to construct the intersection during the 11 weeks that school was out of session in 2010. The roundabout was designed such that no impacts were made to adjacent properties, lakes, or utility lines.

Lewis Stein Road Widening Project

Downtown Enhancement Project
Fort Collins, CO

Interwest provided engineering support to the City of Fort Collins for the design of numerous intersection improvements. The project included upgrades to Mountain Ave., Mountain & Mason Intersection, left turn lane extensions on College Ave., addition of enhanced crosswalks at four major intersections on College Ave., storm drainage improvements and adherence to new ADA Accessibility Guidelines. The project included state funding and coordination with the Colorado Department of Transportation.

Client: City of Fort Collins

Neighborhood Livability (Speed Control) Program

Kechter/Ziegler Roundabout
Fort Collins, CO

Interwest prepared the construction documents for the first Arterial/Arterial Modern Roundabout in Fort Collins. Design included full drainage study, profiles and grading, as well as the relocation of existing irrigation facilities for the New Mercer Canal. Modeling and geometrics of the Roundabout was prepared by City of Fort Collins Staff.

Client: City of Fort Collins

Lewis Stein Road Widening Project

Fort Collins Railroad Crossings
Fort Collins, CO

Interwest staff provided the city of Fort Collins Engineering Department with preliminary horizontal design for five railroad crossings throughout Fort Collins. Interim and ultimate roadway configurations were considered at several sites. This information was then available for PUC permitting and project budgeting. We prepared final construction drawings for two of the crossings.

Client: City of Fort Collins

Fort Collins Railroad Crossing

Harmony Road Corridor Projects
Fort Collins, CO

Interwest designed of the widening and median improvements for several projects on Harmony Road. Two of these projects are improvements related to adjacent commercial developments, which include interim and ultimate plans for widening and median design as well as coordination with CDOT for Access Permits and Access Line revisions. Additionally, we prepared design documents for the city of Fort Collins for approximately 2.5 miles of Harmony Road which had no bicycle lanes. Other responsibilities along the Harmony Road Corridor include the construction staking setup for the Harmony Road and I-25 Interchange Project.

Client: Private Developers & City of Fort Collins

Harmony Road Corridor Project

Harmony Bike Lanes
Fort Collins, CO

Interwest provided engineering support to the city of Fort Collins for the design of the widening of two miles of Harmony Road to accommodate bike lanes. This project included roadway widening, intersection improvements, utility relocation, and pavement re-striping.

Client: City of Fort Collins

Harmony Bike Lanes

Timberline Road Improvements
Fort Collins, CO

Interwest provided the preliminary and final design plans for the Timberline and Drake, Timberline and Prospect intersections, and the widening of Timberline Road to 4-lane arterial standards for approximately 7,000 feet. This $7.5 million project included roadway widening, intersection improvements, signal designs, bridge widening, utility relocations, trail relocation, landscaping and pavement re-striping.

Client: City of Fort Collins

Old Town Elk Grove


Transportation Design
Traffic Impact Studies
Traffic Engineering
Transportation Planning
Intersection, Roadway and Highway Design
Roundabout Design
Traffic Control Plans
Channelization & Pavement Marking Plans
Pedestrian Bridge / Underpass
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