Transportation employees of retail businesses, such as truck drivers
or truck drivers' helpers, who regularly and recurrently cross State
lines to make deliveries or to pick up goods for their employer; or who
regularly and recurrently pick up at rail heads, air, bus or other such
terminals goods originating out of State, or deliver to such terminals
goods destined to points out of State; and dispatchers who route, plan
or otherwise control such out-of-State deliveries and pick ups, are
engaged in interstate commerce within the meaning of the Act.