Fazio's volume on the BMT engineering and operation is a must have for any fan of the BMT. The system was developed and evolved based on engineering considerations perhaps more so than the other two systems operating in New York prior to the takeover by New York City.
The loop system was interesting because like the Chicago system, it was intended to run through trains into destinations areas and return them quickly. This increased the capacity of the facilities.
The other fascinating part of the BMT thinking was their focus on developing lightweight prototype cars to extend the life of its el system
