Construction of a new Chicago Bears stadium in Arlington Heights would generate thousands of jobs and billions of dollars in economic activity, but would also require substantial taxpayer support for infrastructure, according to team projections released Tuesday.

Infrastructure such as entrance and exit ramps from near Route 53 and changes to the adjacent Metra train line would cost $855 million in public funds, the team’s consultant estimated in its report. The report attempts to assuage concerns about the price tag by pointing to gross state tax revenues of almost $1.3 billion over 40 years, according to projections from HR&A Advisors, Inc.

A village consultant’s review of the team’s report also provided new details on the size of the proposed mixed-use development around the stadiu

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