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

Notwithstanding chapter 160 of the General Laws or any other general or special law or rule or regulation to the contrary, no railroad corporation, including the Massachusetts Bay Transportation Authority, shall permit a locomotive engine passing on its railroad in the town of Concord to sound a whistle at any grade crossing in the town that is otherwise protected by the following safety features: (i) flashing lights in each direction which are automatically activated by an approaching train; (ii) 2 gates, 1 on each side of the crossing, both of which are automatically lowered by an approaching train and both of which extend across approximately ½ the width of the lanes of traffic so that the entire width of the lanes of traffic is blocked when the gates are lowered; (iii) a bell that is automatically activated by an approaching train; (iv) overhead street lights; (v) signs posted before the grade crossing in each direction warning pedestrians and motorists of the crossing ahead; (vi) posted speed limits for traffic which shall not be more than 25 miles per hour; and (vii) not more than 2 lanes of vehicular traffic in each direction at the grade crossing. Notwithstanding this act, a train shall sound its whistle in the event of an emergency.