What is the maximum allowable brake pipe pressure for trains consisting entirely of business or passenger cars?

The maximum allowable brake pipe pressure for trains consisting entirely of business or passenger cars is 105 psi. This higher pressure allows for effective braking performance across the entire train, which is particularly important given the design and requirements of passenger operations. Passenger and business cars have specific braking needs to ensure safety, rapid response, and efficiency during operation.

Conversely, lower maximum pressures would not provide the same level of braking efficacy needed for the safe operation of these types of trains, especially in emergency situations where timely and effective braking is crucial. High pressure up to the allowed maximum supports the integrity and reliability of the train's braking system, crucial for transportation safety standards.