Forums Forums Traffic Signals Slot cutting – encapsulate requirements Reply To: Slot cutting – encapsulate requirements


Hi Andy

My experience is that on the Cornwall Council network the bitumen direct approach has been used for a very long time.  However on the trunk road in the County

National Highways specified epoxy resin.  I know this having been involved in the debate because the same company used to install loops for either party and there

would be frustration from the company at inconsistency between the two approaches.  I never noticed any premature fails on the bitumen direct approach.  I guess the bitumen cooling and forming around the loop cable in the slot is a robust finishing situation for the loop.  We had loops that were still going after 30 years for sure using the itumen direct approach.  I understand why national highways wanted epoxy maybe due to higher speeds , much more expensive TM on repairs and a vastly bigger network maybe          Cheers Alan