 Due to freight trains laying up as far west as Union Avenue, the line would have to be physically separate from the freight line or the cars would have to be built to a higher crash standard.Comments included begin raising the line at Union Avenue, since it would have to go to street level anyway, to avoid interference with the freight line.Some advocates of improved mass transit on the island oppose the plan, however, preferring instead the option of through service between Arlington and Tottenville via the existing Staten Island Railway, this made possible by the installation of the Ball Park loop in 2001 (since discontinued but still intact).