Choose Max Travel Speed
I own a classic VW, and my maximum speed is 50mph, I love using Waze but there is no current map or navigation app that will consider a maximum speed for classic vehicles and caravans, I would love to be able to change my max speed for a planned journey.
I cannot imagine this would be too hard to implement and would be very helpful to many people.
You could create it like the speed limit setting. Set it to one of three different option or the slowest of three. 1. A specific speed, 2. A specific speed below the limit. 3. A % below the limit.
Yes there is, CoPilot GPS offers that. See https://softwarerecs.stackexchange.com/questions/42547/map-application-that-can-balance-time-vs-nice-itinerary
We drive an RV. Never go over 60mph when on highways, and often go lower than posted speed limits on windy roads.
Chris Howard commented
Very useful for all the people on mopeds and125cc motorbikes in the U.K. as well.