What we really need is the Oak Ave/Hwy 50 interchange to be built. That way all the mall traffic can use the E. Bidwell exit and the people who live in Folsom can use the Oak Ave exit.
An interchange at Oak Ave would be less than one (1) mile away from the current Prairie City exit. Not a lot of bang for the buck IMO.
Maybe some day when Sout of 50 develops but right now I just dont see the need