When the traffic volume increases and leads to light congestion, the high density and one-way street network system (Mode 4) is the best. Key conclusions can directly guide road network planning.

当交通量增多和出现拥堵时，高密度的单行线路网系统(模式4)更具优势。关键结论可直接指导规划实践。

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There will be an increased police presence and a one-way system is introduced on the Mountain Road.

BBC: Isle of Man police appeal for 'respect' during TT

The junction at Saddle Road in Douglas will be closed with a one-way system in place between Millmount Industrial Estate and Ballaughton Close.

BBC: Isle of Man roadworks set to begin