Originally Posted by dougmc

Texas does, under some conditions.

545.058. DRIVING ON IMPROVED SHOULDER.
(a) An operator may drive on an improved shoulder to the right of the main traveled portion of a roadway if that operation is necessary and may be done safely, but only:
(1) to stop, stand, or park;
(2) to accelerate before entering the main traveled lane of traffic;
(3) to decelerate before making a right turn;
(4) to pass another vehicle that is slowing or stopped on the main traveled portion of the highway, disabled, or preparing to make a left turn;
(5) to allow another vehicle traveling faster to pass;
(6) as permitted or required by an official traffic-control device; or
(7) to avoid a collision.
(b) An operator may drive on an improved shoulder to the left of the main traveled portion of a divided or limited-access or
controlled-access highway if that operation may be done safely, but only:
(1) to slow or stop when the vehicle is disabled and traffic or other circumstances prohibit the safe movement of the
vehicle to the shoulder to the right of the main traveled portion of the roadway;
(2) as permitted or required by an official traffic-control device; or
(3) to avoid a collision.
(c) A limitation in this section on driving on an improved shoulder does not apply to:
(1) an authorized emergency vehicle responding to a call;
(2) a police patrol; or
(3) a bicycle.

Originally Posted by njkayaker

No state allows cars to drive (travel) on the shoulder.

Originally Posted by dougmc

Ultimately, lots of signs are "redundant" -- but if people aren't aware of the law, it's helpful to have a sign to remind them, so I wouldn't really use the term "redundant" when I really meant "more than is absolutely necessary".