u/JaceAtCoffeeStain I was at the belief the vehicles did record a rough speed based on the distance covered within the time period allotted (I believe roughly one second) between waypoints when recording a path.
I have actually recorded multiple paths within a central elevated factory building where when recording I drive at no more that 20 KMH (KPH) on entry and accelerate to full speed on exit, when testing the path on autopilot it does actually slow down when entering the building and accelerate to full speed on exit.
The Building has a large concrete floor with an entry and exit and about 8 truck stops aligned one after the other with a two concrete floor separators between them (to prevent undesired unloading), The vehicle follows a single width concrete floor path and when arriving at it's destination veers left into the desired truck stop one concrete block to the left of the main path.