<VV> NHTSA Amber Turn Signal Study

Joel McGregor joel at joelsplace.com
Wed Aug 8 07:56:03 EDT 2018

Interesting read.  One big problem is that they didn't study enough vehicles.  The chart where they compared vehicle age to rear end collisions was very telling.  Wild swings in percentages of how much amber turn signals helped or didn't in that chart.  Also the advantage of amber turn signals showed 2.8 to 8.3% but the control group of rear end accidents when turn signals were not used showed a 6.1% advantage to amber so that pretty much tells you the numbers they got were inconclusive.
Joel McGregor

-----Original Message-----
From: VirtualVairs <virtualvairs-bounces at corvair.org> On Behalf Of David S Malcolm via VirtualVairs
Sent: Saturday, August 04, 2018 3:45 PM
To: virtualvairs at corvair.org
Subject: Re: <VV> NHTSA Amber Turn Signal Study

Interesting report. They seem to have done a good job given the constraints on possible designs. Amber does seem somewhat better than red in preventing rear end collisions.

What caught my eye was data reported that side markers in another study reduced accidents where the car is struck in the side by about 16%, about 4 times the effect of amber directionals. I guess all you Corvair owners with 1967 and earllier cars should be installing 68 or 69 side markers.


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