As the number of fires sparked by e-bike and e-scooter batteries surges citywide, the MTA is exploring new guidelines for riders that could limit the number of electric vehicles on trains and in stations. The transit agency last year lifted permit requirements and a $5 fee for bicycles on Long Island Rail Road and Metro-North Railroad trains in an effort to better incorporate cycling into the regional transportation network. But several MTA board members now say regulations on battery-powered vehicles should be considered as commuters share space with a growing number of e-bikes and e-scooters. “You’re seeing more and more people taking them on the trains and some are like small motorcycles,” MTA board member Gerard Bringmann told THE CITY. “We want a policy in place before one of these things goes on fire on a train.”