High Quality Content by WIKIPEDIA articles! The M5 Legacy Way (formerly Northern Link Tunnel) is the fourth of five components of Brisbane City Council`s TransApex Project. The project involves two bored tunnels carrying two motorway grade lanes of traffic in each direction from the Western Freeway in Toowong to the Inner City Bypass at Kelvin Grove. The tunnel will be approximately 5.5 km long and will be tolled for approximately 45 years.