As several have mentioned here big RV's are not tested for
crashworthiness, dynamic stability and road handling. Couple this with
elderly/older drivers with ordinary drivers licenses and you may have
a recipe for impending disaster. It looks like several lawyers make a
living off of the RV industry:

http://rvforsaleguide.com/rv-accident-lawyer.htm

Claims of several thousand a year killed by RV's are made. It just
takes a few cases for most products to get recalled why are RV the
exception? Are you RV drivers guinea pigs/cannonfodder for a predatory
RV/lawyer industry. You die while others profit. Is your life that
cheap?

Careful driving does not make up for unsafe/untested products as there
are  always the unsafe or impaired drivers. Operators of RV's need
controls easy to see and operate with ergonomic seating and cockpit
arrangement. They need low overhead alarms, back up cameras and
infrared night vision to increase the safety. The vehicle could use
stability, traction control and driver alertness metering equipment.

I would even go as far as considering external airbags to lessen the
harm done to pedestrians, smaller cars, bicyclist and motorcyclists.
Increased operating testing would be a good economical start followed
up with more stringent vehicle testing. There is no reason why RVers
have to be treated as second class citizens.

Miguel