The last that I recall the Brifen system ran about $150,000-200,000 a mile for complete engineering and installation, that was many years ago before they became more common. For comparison the last time that I heard a price concrete Jersey Barriers run roughly $1,000,000 a mile. I remember when there seemed to be a crossover fatality every few months on LHP. The Briffen system had been used in Europe for many years and the installation on LHP (up near Memorial) was the first test in the US of a cable barrier system which was paid for by the
Briffen USA distributor (now based in OKC). It was very successful and led to the adoption of the cable barrier system where cost per mile is an issue since it can do 5 miles for the price of 2 mile of Jersey barrier.
I have heard many gripes about cable barriers, mainly from motorcycle riders and the "cheese slicer" imagery that they have in their mind. All I know is that just north of NW 63rd the barrier caught a crossing Suburban and that kept them from coming into my lane, I was in an RX-7...I think we know what the likely outcome of that would have been. I also had a car come over a Jersey Barrier in Austin (on Mopac just south of 183) on a Saturday afternoon. If I would have been in my F-150 I would have hit them, since I was on the motorcycle I had more room for avoidance maneuvers and missed them after they landed in the two inside lanes by about 6 feet. I have had more close calls when it comes to crossover accidents coming my way than I ever have being forced into the median, it 44 years of driving/riding I can't think of when I have been pushed that far into a barrier.
Since many people seem to lack the ability to control their vehicles things like this need to be around to protect us from the idiots out there.
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