What is your average freeway/highway speed?

So far with the motorhome, I find I prefer to stay in the 60-65 mph range. I share the concern for safety if traveling too much slower than the traffic, but for our own safety, I feel that it's best to avoid going over 65 for any extended period of time. That is also the way I handled towing travel trailers....especially since most trailer tires are only rated for 65 mph.