There's this three-way stop just down the road from my house (Auburn @ Cook, for you locals) where one of the legs immediately transitions to a bridge over I-69. It is a major bottleneck at morning rush hour, with traffic backed up more than a quarter mile in both directions of Auburn Road, as people are trying to get to the junior high and high schools on Cook. It's a moderate bottleneck at afternoon rush hour, with dozens of cars lined up on Cook trying to turn either way onto Auburn.
Before: 2-lane bridge, 3-way stop with one lane in each direction.
Do: Destroy bridge, cutting off easy access to east Fort Wayne for thousands of people and gerhosing the traffic patterns of thousands more. Spend three months rebuilding the bridge higher. As an exclamation point, close the whole intersection for two weeks at the end to rebuild it, essentially making Auburn Road a mile-long cul-de-sac.
After: 2-lane bridge, 3-way stop with one lane in each direction.