1) A bridge that a horse could cross, perhaps one in a bridle-way.
1599 we lay a payne that thinhabitantes of trumflete and Thorpe do make the horse bridge sufficient between trumfleete Marshe & thorpe Marshe
1606 The inhabitants of Skelton for [not duly repairing] a horse bridge called the Evill-slack Bridge
1667 paid to Tho. Acum for the mending the horse bridge 2s, Bridlington.