More than 200 violence prevention workers will be in Brooklyn this weekend to help keep residents safe during the West Indian Day Parade and J’Ouvert festival. Meanwhile, the Port Authority is cutting AirTrain fares to JFK through Labor Day to ease congestion during one of the busiest travel weekends of the year. Plus, on this week’s transit segment: Federal officials are soliciting new design proposals for Penn Station with construction targeted to begin in 2027. And the city approves a pilot for eight autonomous vehicles to test in Manhattan and Brooklyn.