Premium Content Subscriber only PRELIMINARY works on the first stage of Springfield Parkway and Springfield Greenbank Arterial's $46 million upgrade have this week commenced. Ipswich City Council has released an early look at the major project - the city's largest road upgrade - which includes the duplication of the high-traffic roads, turning two lanes into four. A single span 20-metre bridge crossing Opossum Creek is also set to be constructed during the six-month project. RELATED: Bulk earthworks in preparation for services relocations, the installation of retaining walls, along with stormwater and underground conduit installation will take place during Stage One. Council announced the upgrades last month following a report presented at its last meeting, which identified the road's struggle to keep up with the 20,000 cars using it every day.