Texas Health and Safety Code - HEALTH & SAFETY § 772.202. Purpose

(1) it is in the public interest to shorten the time required for a citizen to request and receive emergency aid;

(2) there exist thousands of different emergency telephone numbers throughout the state, and telephone exchange boundaries and central office service areas do not necessarily correspond to public safety and political boundaries;

(3) a dominant part of the state's population is located in rapidly expanding metropolitan areas that generally cross the boundary lines of local jurisdictions and often extend into two or more counties; and

(4) provision of a single, primary three-digit emergency number through which emergency services can be quickly and efficiently obtained would provide a significant contribution to law enforcement and other public safety efforts by making it less difficult to notify public safety personnel quickly.