Construction Bulletin Number 6
 
Subject: Installation Of Inductive Detection Loops
Category: Roadway - Traffic Signals
Issued: October 15, 2001
Contact Person: Jimmy Travis
Phone Number: (919) 733-2210 Ext. 221
E-mail Address: jtravis@dot.state.nc.us 
Issue Details:  
This is a reminder that under the 1993 NCDOT Traffic Signal Specifications (Section 17.8 & NCTSS–TYP–10) and the soon to be implemented 2002 Standards Specifications for Roads and Structures (Section-1725), there are requirements for the installation of inductive detection loops. 

Deviation from the specification, such as the use of "backer rods" as part of the loop sealant, can result in increased maintenance cost and reduced service life. Inspection and testing of inductive detection loops should be performed in accordance with all applicable specifications. 

If you have any questions or comments, please contact Benny Johnson at (919) 733-5071 or e-mail bjohnson3@dot.state.nc.us.

References: 1993 NCDOT Traffic Signal Specifications (Section 17.8 & NCTSS–TYP–10) and the 2002 Standards Specifications for Roads and Structures (Section-1725)
Illustrations:  None

This Construction Bulletin has been issued by the NCDOT Construction Unit to clarify, discuss, interpret and provide guidance for contract administration issues related to NCDOT construction contracts.