Civil Engineering Firm KS Associates Completes Surveying for a Traffic Signal Installation Without Ever Stepping into Traffic, Thanks to 3D Laser Scanning Technology

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Detoured traffic as a result of a bridge rehabilitation project called for the installation of a temporary traffic signal at a local intersection. KS Associates utilized 3D laser scanning technology to obtain survey data swiftly and safely, resulting in an efficient delivery of the much-needed signalized intersection.

KS Associates 3D Laser Scan

The primary benefit of laser scanning on this project was the speed at which the precise locations of overhead wires were obtained, which expedited construction and reduced project costs.

For this project, laser scanning provided several benefits over conventional surveying, making it easy to design a signal around a large number of utility lines and avoiding repeat field work. - Mark B. Skellenger, P.E., KS Associates Vice President

KS Associates, Inc., a civil engineering and surveying firm located in Elyria, Ohio, has completed the design of a temporary traffic signal in Sheffield Village, Ohio. The signal was necessary to safely manage detoured traffic as a result of an Ohio Department of Transportation (ODOT) bridge rehabilitation project. What is unique about this project is the speed at which the design was completed, and KS Associates’ ability to survey the project without ever having to step into traffic — thanks to the utilization of 3D laser scanning technology.

In 2013, ODOT commenced construction of the replacement of a four-span bridge on a well-traveled route (Abbe Road) over I-90. The project required the closure of Abbe Road and the diversion of traffic to alternate state routes. Although the intersection of French Creek Road and East River Road was not part of the planned detour, this intersection is well-known among local motorists. Consequently, the intersection experienced a significant increase in traffic volume resulting in long waits and heightened driver frustration. Two serious accidents were reported at the intersection during the first week of the bridge closure.

KS Associates serves as Village Engineer for Sheffield Village and performed a traffic study, which warranted the installation of a temporary traffic signal. The first step in the signal design was to perform a survey of the intersection to update existing plans to accurately reflect existing conditions. The survey was challenging due to the large number of hard-to-reach utility lines. The new facilities had to clear these lines by specified amounts, and new signal heads had to be in clear sight for approaching motorists.

To overcome this challenge, KS Associates deployed its Leica C10 3D Laser Scanner. Using the scanner, a field surveyor safely and singlehandedly acquired a comprehensive scan of the intersection — in one trip to the project site and within approximately one hour.

KS Associates traffic engineers used the scan data to design the signal, which involved positioning new poles and supporting wires through a maze of existing utility lines.

The primary benefit of laser scanning on this project was the speed and ease of data capture -- particularly for the overhead utility lines. Laser scanning resulted in a fast delivery of a safe, signalized intersection and helped to reduce project costs. In addition, the scan data gave the designer greater flexibility in determining the locations for the new signal and support wires, which avoided design conflicts and repeat fieldwork.

About KS Associates, Inc.:
KS Associates is a civil engineering and land surveying firm founded in 1987. The firm provides planning, design, bidding and construction phase services related to public infrastructure projects in the areas of transportation, potable water, waste water and storm water; site development engineering services for institutional, commercial and residential uses; coastal engineering services; land surveying and mapping services; and 3D laser scanning services. KS Associates is a Disadvantaged Business Enterprise (DBE). For more information visit http://www.ksassociates.com

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Kathleen Bast
KS Associates, Inc.
+1 (440) 365-4730 378
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