Originally Posted by
vicarious_MR'er
Since taxis and shuttles are pretty much universally exempt from car seat laws entirely, I can see no reason why there would be any kind of issue...
Actually, the exemption is far from universal - taxis are not exempt in California, for example. I just bought a Ride Safer vest for use on a trip there and to Oregon.
OP, I've not used the Ride Safer vest yet, but I suspect it won't be a problem on Super Shuttle. The only issue I could see is if the van doesn't have shoulder harnesses, in which case some of the newer vests would not work.