1995 Archaeological work begins.
2000 Scope increases in tandem with advance works contract.
October 2001 E 135M (£88M) construction contract awarded by for by Dun Laoghaire Rathdown Council, funded by National Roads Authority.
August 2002 Archaeological dig due to end at castle. Calls for dig to be extended.
September 2002 Protesters occupy castle site.
February 2003 Protesters successfully appeal to Supreme Court against removal of castle ruins as illegal under 1994 amendment to Monuments Act.
April 2003 Dun Laoghaire Rathdown Council applies directly to environment minister to allow work go ahead.
July 2003 Environment minister Martin Cullen seeks to amend Monuments Act that prevents work unless archaeological interests are protected. Irish parliamentary rules require the amendment to be before the Dail for 21 continuous sitting days, and it becomes effective in November 2003.
December 2003 Protesters apply for High Court injunction saying the environment minister is acting as judge and jury, promoting the road project while adjudicating on archaeology.
January 2004 Action fails but is appealed successfully to Supreme Court which rules that the law must be changed by new legislation and not by ministerial order.
July 2004 New amending legislation passed.
August 2004 Minister gives go ahead for work to continue.
September 2004 High Court injunction sought by protesters claiming the new law was unconstitutional fails. Protesters may seek appeal to Supreme Court.