PlanHub allows you to see the current projects available for bid throughout Arizona. Construction Bidding Opportunities.To register to receive notifications about solicitations relevant to your business please visit in our e-procurement system, APP and register. How do I submit a bid or proposal? All formal bids and proposals shall be submitted as specified in the solicitation document. Most ADOT bidding can be done online using Bid Express, a third-party website which handles construction bidding for many different entities, including ADOT. Quick, comprehensive access to construction projects in Arizona for bid, including exclusive projects, plans, specs, bidder lists, and project details. Browse Bid Opportunities. Visit the contractor's profile and click 'Invite to Bid. ' Fill out the project details, including scope, timeline, and specific needs.