The Cross City Tunnel links with the Cahill Expressway.
One of the conditions of approval for the Cross City Tunnel was that traffic noise and its visual impacts in the Royal Botanic Gardens and the Domain be mitigated. Some time ago the Royal Botanic Gardens Trust suggested building sound barriers along both sides of the Cahill Expressway that would reduce noise.
Four options (including not building a wall on the Domain side of the Cahill Expressway) were tested during February and March 2005 in focus groups, on-site interviews, web-based surveys and Friends of the Botanic Gardens questionnaires.
The decision was made to erect sound barriers on both sides of the Cahill Expressway. A higher timber fence has replaced the one beside the service road on the Royal Botanic Gardens side (with a transparent section on the existing picket fence at the western end), and a sandstone-faced concrete wall, on the Domain side was completed in April 2006.
The wall also serves as a memorial to Australian servicemen and women who have died overseas whilst on non-combatant duty.
For more information on the Royal Botanic Gardens & Domain Trust plan for the Domain Garden Memorial Wall please go to the Royal Botanic Garden website.
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