Abstract: A precast concrete curved grade crossing includes a plurality of base members, each of which has a central recess formed in the upper surface thereof. The central recess receives a plurality of center panels. The plurality of base members and center panels are laid end-to-end to form a curved crossing. Each of the plurality of base members and center panels have a substantially trapezoidal shape which varies in dimension proportional to the radius of curvature of the crossing. A restraining rail is removably attached to a first standard rail, both being received between the base members and center panels to add rigidity and structural stability. The first standard rail together with the restraining rail are encased by a wide rubber boot which extends through the crossing in a single continuous piece to maintain electrical isolation between the concrete base member and center panels and the first and restraining rails.

Abstract: A precast concrete grade crossing includes a plurality of base members, each of which has a central recess formed in the upper surface thereof. A pair of rails are each encased by a rubber boot which extends through the crossing in a single continuous piece. The boot-encased members are received in the recess which includes a shoulder along the outer side of each rail. The shoulder bears against a lip of the boot which extends upwardly to along outer side of the head of the rail to prevent moisture from entering the space between the boot and the rail below the shoulder.