Garmin RV 895 and Fifth Wheels

for years, traveling to and from, here and there, also with a Gramin. Garmin wants me to buy a new one so i can add the app. Anyhow, on a recent trip, hills, tunnels etc. I typed in on the puter highway clearances and grades etc. for the state and route we were on. Example when in Laevingworth Washington, the hwy we planned west towards Whidbey Island. an interactive map shows up with clearances. you just put in the height you want to avoid and it gives you anything less than that. Also grades of hills as well like in Arizona comapring grades and lengths of grades.
works well for me. Good Luck, Be Safe ! ! !