A$3.6m; second carriageway completed in December 1986. 1985 - Logan Road to Compton Road. Fifth and final stage of the South-East Freeway officially opened by Minister for Main Roads and Racing Russ Hinze on 22 November 1985. 1986 - Logan River bridge duplication. New concrete bridge across Logan River, duplicating the 1968 bridge, officially opened by Minister for Main Roads and Racing Russ Hinze on 16 July 1986. 1987 - Mudgeeraba Interchange. Half-diamond interchange at Mudgeeraba Road opened by Minister for Main Roads and Racing Russ Hinze on 21 August 1987. 1987 - Coomera Interchange. Interchange opened by Deputy Premier and Minister for Main Roads Bill Gunn on 10 December 1987. Much like the later interchanges at Ormeau, it had a very short life of only 12 years. 1987 - Smith Street Motorway. New motorway connection road opened to connect Southport to Gaven. A new interchange was built with the Pacific Highway as part of the project. The opening date was May 20. 1988 - Worongary Interchange. Half-diamond interchange opened by Deputy Premier and Minister for Main Roads Bill Gunn on 27 July 1988. 1988 - Chatswood Interchange Stage 1. This stage involved construction of the Paradise Road roundabout, service roads and northbound on and off-ramps. 1989 - Reedy Creek Interchange. Interchange completed in September 1989. 1989 - Chatswood Interchange Stage 2. Chatswood Road linked to Paradise Road roundabout via a new access road under the highway. Over 30 years later the interchange is still in use. 1990 - Computer Road Interchange. This interchange only lasted 9 years, being replaced by the current one in 1999. 1991 - Peachey Road Interchange. This one did not last long either, also being replaced in 1999. 1991 - Nerang to Mudgeeraba Duplication. Duplication to four lanes between Pappas Way and Mudgeeraba Road and a new interchange at Elysium Drive opened by Federal Minister for Transport Bob Brown on 23 December 1991. 1992 - Helensvale Interchange. Upgraded interchange at Gold Coast Highway opened by Federal Minister for Transport Bob Brown on 29 October 1992. 1993 - Mirambeena Drive Interchange. Like the two interchanges north of it, it was also replaced in 1999. 1993 - Rochedale Road to Watland Street six-laning. 1994 - Mudgeeraba to Reedy Creek duplication. Duplication to four lanes between Mudgeeraba Road and Reedy Creek Road and a new overpass at Reedy Creek Road opened by Minister for Transport David Hamill on