[1] The transept of a church separates the nave from the sanctuary, apse, choir, chevet, presbytery, or chancel.
When churches have only one transept, as at Pershore Abbey, there is generally a historical disaster, fire, war or funding problem, to explain the anomaly.
At Beauvais only the chevet and transepts stand; the nave of the cathedral was never completed after a collapse of the daring high vaulting in 1284.
At St. Vitus Cathedral, Prague, only the choir and part of a southern transept were completed until a renewed building campaign in the 19th century.
Placing the bridge in a transept rather than an enclosed tunnel allows passengers to see the platforms, creating a less cramped feeling and making orientation easier.