The Overloaded Stop on a Hill
You are on a scheduled route in a hilly city. At a stop on a 7% upgrade, 14 people are waiting, including two with walkers and one person in a manual wheelchair. Your bus is a low-floor 40-foot with a front ramp, currently carrying 38 passengers; seated capacity is 36 with a stated crush limit of 60. The stop has no shelter, it is raining, and the sidewalk behind the waiting group slopes down toward a busy intersection. A car is parked partly in the bus bay, so you cannot pull fully to the curb. Traffic behind you is light but a delivery van is stopped 15 metres back with its hazards on.
1. Walk through your loading decision: where you stop, who boards, and in what order.
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First, position: I cannot pull fully to the curb because of the parked car, so I stop as close as is safe and consider whether the gap forces passengers into the traffic lane. On a 7% grade with rain, I set the parking brake, keep my foot on the service brake until the brake is confirmed holding, and put the bus in neutral only if the procedure requires it - otherwise I stay in gear with brakes applied. I deploy the ramp only where the landing is firm and level; the sloping sidewalk is a fall risk, so I may need to reposition slightly or assist. Order: I let the person in the wheelchair board first while the aisle is clear, secure the wheelchair, then board the walker users with assistance, then the ambulatory passengers. I count as they board, because 38 aboard plus 14 waiting would be 52 - within the 60 crush limit but well over the 36 seated capacity, so I must decide how many standees I am willing to carry on a hill in rain.
2. You are at 52 passengers, over seated capacity, on a grade. What are the safety considerations and what do you do?
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Standing passengers on a steep grade are a real risk: the bus will pitch on every start and stop, and standees have only handrails. The crush limit of 60 is a structural figure, not a comfort or stability target, and it does not account for a wet floor, a hill, or the reduced control margin of a heavily loaded bus. I would cap the load below the crush limit with a margin - for example, take on only as many as I can seat plus a small number of standees who can reach handrails, and ask the remainder to wait for the next bus, telling them when it is due. I also brief the standees to hold on and expect a slow, smooth pull-away. If the next bus is far off, I would request a supplementary vehicle by radio rather than fill to the limit. The decision is mine, and the schedule does not override stability and fall risk.
3. As you prepare to pull away, the bus rolls back slightly before the brakes release. What does that tell you and what do you do?
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Roll-back on a 7% grade means the holding effort is marginal - either the parking brake is not fully applied, the service brake was released before drive torque was established, or the load has pushed the available brake or clutch/torque capacity to its limit. I stop immediately, reapply the brake fully, and confirm the bus holds with no movement before doing anything else. Then I check that the parking brake is fully set and that I am using the correct hill-start procedure for this transmission. If it still rolls, the bus is not fit to continue on this grade with this load, and I would not proceed: I would unload safely at the stop, report the defect, and request a replacement or a route change. A roll-back near pedestrians and a downhill intersection is exactly the scenario that produces a serious collision.