State rules or regulations that require 24 hour maintenance of temporary traffic warning devices along highway work zones

Section 701.04(b)(2) of the Illinois standard specifications explains:
“Surveillance. When open holes, broken pavement, trenches over 75 mm (3 inches) deep and 100 mm (4 inches) wide or other hazards are present adjacent to an open lane, in a closed lane, or adjacent to the closed lane, the Contractor shall furnish Traffic Control Surveillance during all hours when the Contractor is not engaged in construction operations. The surveillance person(s) shall be provided with adequate transportation and communications to ensure deficiencies can be corrected. The surveillance person(s) shall drive over and inspect the work, maintain the temporary traffic control devices, and assist and direct traffic, at such intervals as may be required, not to exceed 4 hours. The person responsible for surveillance shall complete an inspection form, furnished by the Engineer, on a daily basis. The completed form shall be given to the Engineer on the first working day after the inspection.”