As Toronto readies for Taylor Swift's arrival this week, some crowd management and planning experts say additional safety precautions should be taken when tens of thousands of fans fill the city's downtown core on show nights.

The TTC said it expects the extra revenue from added ridership during the six-night stay to offset the additional costs of expanded operations.

Ticketmaster announced in October that ticket transfers for Taylor Swift's sold-out concerts can only start 72 hours before the event.