Six alternative designs for I-375 in Detroit, ranging in cost estimates between $40 million and $80 million, have been unveiled in preparation for an open house this week at Eastern Market.

See the designs in the attached PDF documents.

The public is invited to review and provide feedback on the designs 2-8 p.m. Thursday in Shed 5 of Eastern Market.

The open house, hosted by the Detroit Downtown Development Authority, Michigan Department of Transportation and Detroit RiverFront Conservancy, will provide the second of three opportunities for the public to comment on potential alternative configurations to the 1-mile expressway from Gratiot Avenue to Atwater Street.

The feedback from the open house will be used to narrow designs to two alternatives, Will Tamminga, director of project management for the Detroit Economic Growth Corp., told Crain's last week.

The public meetings are part of the seven-month I-375 Alternatives Study, which was approved by the DDA in December. The $373,000 study is being paid for by MDOT and other sources.

At the first public meeting in February, members of the public were asked to identify what was important for them to see in the future design of I-375. Those results, with the findings of a questionnaire, were used in selecting the six alternatives to study, said Tamminga.

"The results from studies were instrumental in informing and fine-tuning the six design configurations, along with technical data that we have compiled," he said.

Detroit-based Parsons Brinckerhoff, I-375 Alternatives Study consultant, facilitated the questionnaires and analyzed I-375's economic impact, development intentions and traffic patterns.

At the open house, short presentations are planned for 2 p.m., 4 p.m. and 6 p.m.