Hi,

For reference:

NHTSA Study: Reflective Tape Helps Prevent Crashes
http://www.dot.gov/affairs/nhtsa2201.htm

"reflective tape reduces nighttime side and rear impacts into heavy
trailers by 29%."

The Effectiveness of Retroreflective Tape on Heavy Trailers
http://www.nhtsa.dot.gov/cars/rules/regrev/evaluate/809222.html

I could not find any information on prohibited reflective tape colors,
but assume that white is OK as long as the following driver isn't
blinded by the reflection. I haven't heard of anyone being pulled over
by the red/white tape - but have heard of people being pulled over for
leaving their rear-facing "hunting" lights on.

Conrad