The idea of a high-speed rail system from downtown Chicago to O'Hare International Airport has reemerged in the city, with the Emanuel administration seeking an engineering company to study the project's potential costs, designs and routes.

The engineering study would run for 10 months. After the study's completion, the Emanuel administration wants to open the project up to competitive bidding in 2017. 

The city would like a private company to handle the project's construction and operation.

High-speed rail service to O'Hare, an idea considered under former Mayor Richard M. Daley's administration, could cost passengers $25 to $35 for a ticket.