An alternate route to Gungahlin, away from the cars. This would be the safe and better approach. Here is one possible route that follows the Federal Highway, EPIC and Well Station Track to reach Gungahlin.
Overview of the route
There is a bike path from Civic to Dickson and from there it continues north, eventually following the Federal Highway, all the way to Stirling Ave in Watson, opposite EPIC (map section A), where it stops. I would propose a ramped bridge over the Federal Highway (alternatively traverse EPIC) to connect with Old Well Station Rd. Old Well Station Rd runs straight north all the way to Harrison. For most of the distance it is just a dirt track (map section B).
The path would continue along Mapleton Ave, Harrison and continue across Flemington Rd, and along Manning Clark Cres (map section C), which bends north around Mulanggari Grassland Nature Reserve. The path could continue along the north of Mulanggari Grassland Nature Reserve. There is currently a bike path here along Camilleri Way that ends at the end of Gungahlin Place West (map section D).
After crossing the Gungahlin shopping centre (and light rail) there is a park corridor north along Gungahlin Place and Nellie Hamilton Ave, that would connect to Yerrabi Pond at Soroptimist Point. Yerrabi Pond is a hub of paths to north Gungahlin suburbs.
Throsby to Gungahlin Drive bike link
Significantly, there is an interesting intersection here with the bike route along Gungaderra Creek between Thorsby in the north, via Franklin down to the bike path on Gungahlin Drive. There are currently bike paths all the way except for a MISSING LINK between Wimmera Street and Mapleton Ave (map section B). About 400 m of bike path is required here along the creek past Mother Teresa School, Harrison and would intersect at this point the Well Station Track. There is currently a bridge crossing creek here on Well Station Track.
Maps for the route
Continuing the bike path from Watson, continue along Well Station Track