Why an Articulated Bus Needs More Than a Tight Turn
An articulated bus bends at a joint between its front and rear sections, letting a long vehicle follow a curve that a rigid bus might not manage. But the joint does not make the whole bus pivot neatly around a single point. As the front wheels turn, the rear wheels tend to track closer to the inside of the curve—a behavior called offtracking. Meanwhile, the bus’s front or rear overhang can swing toward the outside.
On a narrow cobbled street, the driver must account for both movements. A turn that clears an ancient wall at the front can still bring the rear wheels or body dangerously close to a curb, building, or parked vehicle.
The Turn Is Planned in Small Movements
Drivers approach slowly, position the bus to create room for the bend, and use mirrors to monitor parts of the vehicle they cannot see directly. They judge the turn by the bus’s path, not just by where its nose is pointing. Cobblestones add another constraint: they can be uneven and slippery, so abrupt steering or braking is especially undesirable.
The route itself is part of the solution. Transit operators have to match vehicles to streets, considering turning space and clearance; a street that works for a shorter bus may not work for an articulated one. Where a long bus is used, its flexible joint makes the route possible, but careful positioning and low speed do the delicate work.
That is why these corners can look almost impossible from the sidewalk: the driver is guiding two connected sections through different arcs, with walls close on either side.
