Highway and Structural Design

Slingerlands Bypass NY Route 85

Project Highlights

  • Design of four roundabouts
  • Extensive coordination to minimize wetland and environmental impacts
  • NYSDOT GreenLITES Evergreen certified project for environmental sustainability
  • Significant pedestrian & bicyclist accommodations including pedestrian bridge
  • 2010 Federal Highway Administration Excellence in Highway Design Award, Urban Streets
    – Honorable Mention
  • 2009 International Be Inspired Award for Innovation in Highway Design
  • 2009 Engineering Excellence Award, American Council of Engineering Companies,
    Gold Award for Transportation
  • 2008 Transportation Project of the Year, American Public Works Association, Capital Branch
  • 2008 Transportation Project of the Year, American Public Works Association, New York Chapter

Project Description:

The project involves the reconstruction of 1.75 miles of roadway and the new construction of 1.5 mile of limited-access highway along Slingerlands Bypass on NY Route 85. The reconstruction portion of the project involved widening an existing two-lane undivided highway section to a four-lane divided highway. The existing bridge structure was modified and widened to accommodate the roadway. The new construction portion of the project includes building a four-lane divided highway on new alignment. The project also included the construction of three 2-lane modern roundabouts. Slingerlands Bypass was a pilot project for NYSDOT for the integration of automated machine control grading and the use of Quantity Manager, a Bentley system that utilizes GPS technology. CME developed three-dimensional, digital terrain models (DTMs) of the project design, which were delivered to the contractor to facilitate the layout and construction of the project.

Firm Role:

Creighton Manning Engineering, as prime consultant on this NYSDOT project, was responsible for the preparation of all preliminary and final highway design plans and the environmental impact statement (EIS). Creighton Manning also prepared air, noise and energy analyses for the EIS. Additional services provided by the firm include:

  • Rounabout Design
  • Extensive Traffic Analysis
  • Public Informational Meetings
  • NYSDOT Pilot Project for CAD Innovation
  • Lighting Plans
  • Sidewalk and trail design connecting to pedestrian bridge


NYSDOT Region 1
328 State Street
Schenectady, NY 12305


Robert S. Cherry, PE
Project Manager
Ph: (518) 388-0230


Project Name:
Slingerlands Bypass
NY Route 85

Project Type:
Highway Reconstruction

Town of Bethlehem
Albany County, New York

Construction Cost:

Completion Date:
Design 2006; Construction 2008