At Miami's Downtown Development Authority meeting last week the issue was raised whether it was feasible to build a tunnel connecting Brickell and Downtown Miami, according to Miami Today.
A study was looked at in 2006, but since the span of 10 years the growth of Brickell and Downtown Miami has changed drastically bringing heavier traffic. The bridge is consistently open during rush hour times in the morning and evenings, which increases traffic and causes people honking their horns in their cars. Construction and new development in the area is only increasing in the next 3-5 years and traffic will continually get worse.
Study to put a tunnel under the Miami River will take a year.