Ohio Rev. Code Ann. § 729.12

All new curbs that are authorized by any municipal corporation or township, and all existing curbs which are part of any reconstruction, shall have a ramp with nonslip surface built into the curb at each pedestrian crosswalk so that the sidewalk and street blend to a common level. Such ramps shall be not less than forty inches wide and shall insofar as feasible be constructed in accordance with the standard drawings and specifications for curb ramps of the department of transportation.