Traffic Engineering:

Keck Ridge/Scott Troy Road Turn Lanes

PROJECT NAME: Keck Ridge/Scott Troy Road Turn Lanes
CLIENT: Keck Land Trust
JURISDICTION: City of O’Fallon and St. Clair County
LOCATION: O’Fallon, St. Clair County, Illinois
CONSTRUCTION COST: $230,000 (Est.)
PROJECT DESCRIPTION: Keck Land Trust employed our firm to prepare the Intersection Design Study (IDS) and Construction Plans and Specifications for the intersection of a new subdivision entry roadway (Keck Ridge Drive) intersecting an existing rural county highway (Scott-Troy Road). All phases of the project were subject to St. Clair County Department of Roads and Bridges review for compliance with IDOT standard policies and procedures.  The Traffic Study was completed using the Trip Generation Manual to develop traffic forecasts.  The IDS analysis was completed using Highway Capacity Software (HCS) and IDOT design policies.  Turning movements and corner radii were developed using AUTOTURN software for the appropriate design vehicle, and the intersection sight distance was checked.  The project included the addition of a left-turn lane on Scott-Troy Road.  The construction scope included asphalt widening and paving, asphalt shoulders, ditching, drainage culverts, paint pavement markings and driveway removal and replacement.

Transportation Areas of Service:
Roads & Streets
Traffic Engineering
Planning / Funding Applications
Recreational Facilities
Construction Inspection

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