Hong Kong Police said in an October 29 notice that crowd safety management measures and special traffic arrangements would be implemented from October 30 for the Northern Metropolis Marathon 2026, planned for Sunday, November 1. The force urged the public to plan journeys in advance and use public transport and shuttle bus services where possible.

The arrangements included phased closures of public carriageways, cycle tracks and parts of footpaths on November 1, with times ranging from the early morning to about noon or later depending on the phase and the race's actual finishing time. Vehicle diversions were listed for affected routes in the Sha Tin, Tai Po and Fanling areas, and pedestrians were told they could use the remaining width of footpath in the affected sections.

Parking spaces on Fung Nam Road near North District Sports Ground and a general lay-by were to be suspended from 8am on October 30 to 5pm on November 1, and On Kwan Street spaces from 6pm on October 31 to 8am on November 1. The organiser was to provide shuttle buses and temporary pick-up and drop-off points. Police said illegally parked vehicles in the specified areas could be towed away without prior warning.