[R.O. 2009 § 325.030]
Whenever authorized signs are erected
indicating that no right or left or U-turn is permitted, no driver
of a vehicle shall disobey the directions of any such sign.
[R.O. 2009 § 325.040]
The driver of any vehicle shall not
turn such vehicle so as to proceed in the opposite direction upon
any street in a business district and shall not upon any other street
so turn a vehicle unless such movement can be made in safety and without
interfering with other traffic.