Original sentence: Design specifications called for station dwell times of typically 8 to 15 seconds
Edited sentence: Careful comparison with other modern subway systems would indicate that the builders of the Montreal Metro were clearly focused on a vehicle design philosophy of highly optimized operation.Design specifications called for impressive rates of acceleration, powerful brakes and short station dwell times of typically 8 to 15 seconds.The inherent high-performance characteristics of Montreal's Metro trains offers elevated levels of efficiency, high capacity service as well as high overall service speeds