PolyJohn single- and double-unit trailers can be used on work sites where crews need movable restrooms. These sturdy units are built for highway use or off-road trails, and come with a removable hitch and taillights. For safe and easy access, the design allows units to be lowered to ground level. They can be used by emergency management providers, small special events or at agricultural sites. 800/292-1305; www.polyjohn.com.