New York Codes, Rules and Regulations
Title 21 - Miscellaneous
Chapter III - New York State Thruway Authority
Subchapter A - Use And Occupancy Of The Thruway System
Part 107 - Special Provisions
Section 107.1 - Closing the Thruway system

When conditions, actual or potential, are present, which might endanger the health, safety or welfare of any person or cause damage or destruction to property, the Thruway Authority's executive director, or his designee, may order that the Thruway system, or any portion thereof, be closed to all or any part of the public for such time as in his judgment may be necessary. These conditions include, but are not limited to, fire, flood, snow, rain, hail, wind, accident, overcrowding, riot, civil commotion, epidemic, explosion and chemical or nuclear incident.