No provision of this chapter shall be effective until signs, signals, markings, or other devices giving notice of such local traffic regulations are posted upon or at the entrance to the street or part thereof affected, as may be most appropriate, so that in a proper position they are sufficiently legible to be seen by an ordinarily observant person.
(`63 Code, § 305.05)
Statutory reference:
Uniform system of traffic-control devices, see R.C. §§ 4511.09 and 4511.11(D)