Projects

The City + The Arch + The River | 2015

The City + The Arch + The River | 2015

“The CityArchRiver 2015 initiative is truly a project of national significance. The project to better weave the Gateway Arch and Jefferson National Expansion Memorial (JNEM) into the fabric of St. Louis is intended to serve as a model for generations to come and for other areas struggling with similar issues of making cities more livable and more welcoming to visitors.”

The City+Arch+River | 2015 (CAR 2015) project supports a redesign of the St. Louis Gateway Arch grounds to coincide with the monument’s fifty-year anniversary. CBB’s charge for this project was to develop better connections between the Arch grounds and the regional transportation network for multiple modes of travel. The project was initiated by the National Park Service and the Department of the Interior; it required additional approvals from the United States Army Corps of Engineers (USACE), the Missouri Department of Transportation (MoDOT), and the City of Saint Louis.

CBB’s role in the City+Arch+River | 2015 project began during the project’s competition phase in Fall 2009. Modifications to the local transportation network were ultimately required to achieve the project goals of improved pedestrian and vehicular access and circulation to the Gateway Arch Grounds. Throughout the project, CBB worked with designers and stakeholders to turn vision into reality. As one example, CBB was able to modify arterial connections to reestablish access after the removal of a segment of Memorial Drive reduced the access points to I-44. CBB constructed both microsimulation freeway and macrosimulation arterial model networks (VISSIM and SYNCHRO, respectively) of the study area using a turnkey approach to integrate the various tools and analysis methodologies. CBB helped the project team secure a $20 million USDOT TIGER Grant for construction. CBB provided information to support a final Access Justification Report (AJR) for the CAR 2015 project.  Construction of these improvements was completed in 2015.

Early in the CAR 2015 project, the study team proposed changes to the interstate network and determined that future improvements at the Poplar Street Bridge (PSB) interchange should be coordinated to achieve the greatest system benefits. The PSB interchange project aimed to relieve safety and capacity concerns through significant geometric and access modifications. CBB expanded on the traffic volume projections and the freeway (VISSIM) and arterial (Synchro) model networks of the study area created for the CAR 2015 project using a turnkey approach to integrate the various tools and analysis methodologies. Ultimately, CBB completed a second AJR for the Poplar Street Bridge (PSB). Construction of these improvements is expected to be completed in 2018.

Photo courtesy of Missouri Department of Transportation https://www.flickr.com/photos/modot/

Projects

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CBB 
12400 Olive Boulevard, Suite 430
St. Louis, MO 63141
314-878-6644
314-878-5876 (fax)