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Traffic and Emission Modelling for Surface Roads near the Lane Cove Tunnel Corridor


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Author M Vasilovska


*This is an abstract only. No full
paper was prepared for this abstract.*

The Lane Cove Tunnel (LCT) is an important infrastructure link in New South
Wales (NSW) and runs from the end of the Gore Hill Freeway at Artarmon at its
eastern extremity, to the end of the M2 at North Ryde at its western
extremity.  The LCT is 3.6 km long and generally consists of twin two/three
lane unidirectional tunnels running largely under Epping Road from just east of
Mowbray Road, west to the western end of the Gore Hill Freeway. The tunnel
opened in early 2007.

The presentation will provide a summary of the traffic and emission modelling
performed for selected representative surface road sections in the vicinity of
the Lane Cove Tunnel. An assessment of the predicted impact of vehicle emissions
on ambient air quality in the corridor as a result of changed traffic conditions
due to the tunnel opening will be presented.

The traffic modelling and emission calculations were undertaken for the
following two scenarios:

Year 2006 – Lane Cove Tunnel
no-build option, and
Year 2006 – Lane Cove Tunnel build option.

Vehicle emission calculations for the four main pollutants from vehicles: CO,
VOC, NOx and PM10 on the surface roads in the vicinity of the Lane Cove Tunnel
were performed using the predicted daily traffic for the two cases (no-build and

The analyses indicated that the vehicle emissions for all pollutants are
expected to significantly reduce in the corridor with the building of the Lane
Cove Tunnel, including the areas in the vicinity of all tunnel portals, when
compared to vehicle emissions for the no-build case.  As a result of the
decreased vehicle emissions on the surface roads, the study concluded that the
actual ambient air quality is expected to improve in the corridor including the
tunnel portal areas after the Lane Cove Tunnel opening.