I toured HoJo in January and asked my contact there to let me visit the noisiest room in the hotel. It was overlooking the freeway and I could hear a constant, low-level hum of traffic in the room. Personally I think I could have slept through it without earplugs, and I'm pretty noise-sensitive.
There aren't a lot of rooms right next to the freeway, and the hotel avoids assigning them except when the hotel is completely booked solid. Also, they are looking into installing a double-door system for those rooms that would help cut out the noise.
Mary
MouseSavers.com