[blahedo]

I'm from the US, and I would never expect "feet" in a road sign or on a bike. For distances below a mile I'd expect "½ mile" or "¼ mile"—this is how they are almost universally marked on road signs across the country. For extremely short road distances I've occasionally seen "⅛ mile". For road distances any shorter than that, which in my head I'm thinking of as "very short long distances", at that point I might expect—and I feel a little guilty even typing this out loud—yards. (Or blocks, where 1 block = ⅛ mile, but that's a peculiarly Chicago measurement, I think.)

[genocidicbunny]

Feet do show up on signs, but always in large round multiples of 100 feet. They tend to only show up on low-speed roads though -- signs like 'blind driveway 500ft'. On highways, distance signage is almost exclusively in miles and fractions thereof.