The basic Garmin doesn't know if you're in an RV, a car or on a bicycle. The Garmin specific RV models allow you to program your specific RV and it's specs, (height, weight, length, fuel type, etc.) and will avoid routes that may interfere with that data. I have the Garmin RV 770 and love it. It took us on a really weird route through Bainbridge, GA once but I stayed on the suggested route. Later I found out there was a very steep RR Crossing that would have found us stuck directly on top of the train tracks...also, there was am older, low overpass we couldn't have made it under. Again recently, we were traveling back roads through Albany, GA. The wife's phone said to take "this way"...The GPS said to go a different but longer way. To save my marriage, I went 'her way". The road was so narrow I had to drop tires off the side of the road to pass big trucks. At the end of that leg, I changed my drawers and vowed to NEVER use any method other than the RV specific GPS.
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Now an SOB
Traded Thor for Melbourne Prestige 24NP
2018 THOR Chateau 35SF
Two Labs, Bugsie & Blondie
Blondie passed in 2020 at 5 to Leukemia
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