Hustling or Running Construct vehicles / mounts

[Bane Wraith]

My character has managed to create an animated object, the Craft Construct way, that is both capable of supporting his weight (in light load) and has a movement speed of 40 feet.

Since constructs cannot fatigue, suffer non-lethal damage, does not sleep, etc, it's safe to say that this construct can "Hustle" indefinitely.

Is it safe to say they can also Run indefinitely? (Given that its creator staves off sleep and other activities during this travel time, and can direct it appropriately)?

If so, how would this be calculated for overland movement?

[Garrett Guillotte]

Previous/similar threads: 1, 2

3.5 says "A creature with no Constitution cannot tire and thus can run indefinitely without tiring (unless the creature’s description says it cannot run)."

[Bane Wraith]

I must have a faulty memory.... Thank you for linking me to those.