Gungahlin Drive Extension (GDE) is a freeway grade road, located in the Belconnen district of Canberra, Australia. It is 8.3 kilometres long and extended the previously existing Gungahlin Drive from the Barton Highway in the district of Gungahlin to the Glenloch Interchange to connect with the Tuggeranong Parkway, Parkes Way, and William Hovell Drive. Early in the planning stages, the GDE was to instead be designated the John Dedman Parkway. Route description The GDE consists of two roads: the section of Gungahlin Drive located between Barton Highway and Belconnen Way, and Caswell Drive, located between Belconnen Way and the Glenloch Interchange. Caswell Drive was pre-existing but duplicated and upgraded as part of the works. The extension was originally opened with a speed limit of , but after review was increased to History The Gungahlin Drive Extension project had its genesis in planning that emphasised the motor car as the primary means of travel in Canberra. This philosophy is shown in planning studies dating from the 1960s. In 1991, the ACT Liberal Government began consultations for a John Dedman Parkway project, which would have gone from the Barton Highway to Belconnen Way. This project was subsequently renamed the Gungahlin Drive Extension, with the road proceeding to the Glenloch Interchange. This Gungahlin Drive Extension route and the Majura Road upgrading (between the Monaro Highway and Federal Highway), are two transport routes that are on the drawing board as north-south routes. Some consider the GDE route as a crucial link in Canberra's transport network while others consider it a white elephant and support other transport alternatives, such as light rail between Gungahlin and Civic. The ACT Labor Government won election in 2001 promising a GDE alignment that would travel west of the Australian Institute of Sport AIS. However, the Commonwealth Government's National Capital Authority decided in December 2002 to support an alignment east of the AIS as the preferred route. On 16 January 2003 the ACT Government fell in with the NCA and decided to investigate options for an Eastern Alignment for GDE in the vicinity of the AIS, as well as reviewing options for the alignment in the Aranda Precinct. Supporters of natural parkland campaigned to have the road building stopped, staging a number of demonstrations. However the ACT Government determined that the road be built, and subsequently changed the law to prevent further opposition from community groups. When the GDE was