When is it illegal to park in front of a fire hydrant?

Answer: B — At any time without fire department permission

Parking in front of a fire hydrant is prohibited at all times without permission from the fire department because it is vital for emergency response access. In the event of a fire, firefighters need to reach the hydrant quickly to obtain water to control the blaze. If a vehicle is parked too close to a hydrant, it can significantly delay this process, potentially endangering lives and property. This regulation is in place regardless of whether it is during business hours or when other parking spaces are available. There is no allowance for parking in front of hydrants even during emergencies or normal parking conditions, reinforcing the importance of keeping these critical access points clear at all times.