How successful are ramp signals in their current locations in the central CBD and inner west?
So far, 26 ramp signals have been commissioned and are already operating successfully within the Central Motorway Junction, at each of the southbound ramps along the Southern Motorway between Hobson Street and East Tamaki, and at the Takanini and Papakura interchanges. Data gathered has shown the following results since these portions of the system were commissioned: • 12% improved travel speeds • 18% increase in throughput • Safer merging and motorway incidents being cleared up to 15 minutes faster to restore normal traffic flows In the busiest sections of the Southern Motorway where ramp signals have been commissioned in the southbound direction between the central city and the Ellerslie-Panmure, Mt Wellington and East Tamaki Interchanges, peak period traffic flows have been significantly improved with shortened periods of congestion. The motorway is carrying significantly more traffic during peak periods than before and speeds have increased.
