Rich,
The posted speed limit is 55 mph, and I normally do 65 mph with no problems at all.
One of the biggest problems is the drivers of cages, I have been passed by vehicles doing approximately 40-60 mph faster than I was doing.
A lot of those vehicles were towing trailers with off road vehicles on them, and motorhomes with trailers.
It's a common 'by-pass' to get to the Imperial sand dune area just west of Yuma.
Also becoming a well known short cut to San Diego. Knocks about 75 miles off of the I-10 to I-8 route.
The road opened in late October '99, and for the first 2-3 years, you saw more cattle than vehicles.
Just give me a shout when you do the bearings.