People who live in baton rouge, louisiana, love to complain about traffic, but they have a right to complain about interstate 110 with its truly epic traffic engineering blunders that make every drive along it a dance with death. the goal was to correct the most obvious blunders and reduce traffic accidents along the stretch of 110 that passes through the city. a department of transportation manager examining weekly accident reports prepared by baton rouge law enforcement would be using which of the accepted methods for tracking progress toward goal achievement?