I wouldnt think maintenance would be responsible for routing monorails
maybe if the switch was malfunctioning and maintenance gave the OK to operate?? Routing the monorail path is key in the safety system and would have many interlocks preventing it from sending the train in the wrong path. My guess is a layer of safety was temporarily bypassed hoping procedures would keep it from being activated. I dont know much about monorail safety but you can design interlocks to make it impossible for two moving objects to collide. Safety systems are designed so when a sensor, relay or any component fails, the system shuts down until repaired or overridden. Last week, my car displayed a light bulb failure for the brakes. A back-up light bulb was activated until it could be repaired. Every time I started the car, I had to clear the message. The engineers could have programmed a slow deceleration until the car stopped and lock the start circuit until it was repaired. The point Im trying to make is you can make systems idiot proof. Maintenance and engineering know how to bypass the interlocks.