Be it enacted by the Senate and House of Representatives in General Court assembled, and by the authority of the same, as follows:

Notwithstanding the provisions of any general or special law to the contrary, the city of Malden shall designate areas within said city as senior citizen safety zones. The traffic commission of said city, in consultation with the department of public works, may erect flashing lights and post signs bearing such designation and to establish appropriate speed limits for such zones. Said traffic commission may adopt, from time to time, rules and regulations to carry out the provisions of this act.