Waiting period. Jeff, a local traffic engineer, has designed a new pedestrian foot bridge that is capable of handling the current traffic rate of 260 pedestrians daily. Once the traffic rate reaches 1,800 pedestrians daily, however, the bridge will require a new bracing system, Jeff has estimated that traffic will increase annually at 4%. How long will the current bridge system work before a new bracing system is required? What if the annual traffic rate increases at 8% annually? At what traffic increase rate will the current system last only 8 years