The MTA says it's time to cut the lines--20 bus lines, that is. Because of low ridership and operating costs, the city's transit system is looking to trim the fat from their service. The current proposal being voted on consists of the elimination of 20 bus lines and reduced service on 24 other lines, for a total of 375,000 service hours cut altogether. The Bus Riders Union is vehemently opposing the proposed cuts, with spokesman......