Consider taxation

===Traffic congestion===
London is having some success with its handling of traffic congestion in the central business district with better use of taxes and fees. Congestion is less, commute times are quicker and public transportation got a boost. The new outcomes come from intelligently enacting a government policy. 
Pittsburgh's parking situations discourage vehicle trips to downtown. However, London's problem of traffic spans the day and Pittsburgh's is more centered on the morning and evening rush hours. 
Congestion taxing might be considered. There are plenty of alternatives as well, if we are creative.