In order to reduce traffic congestion and raise revenue for the city, the mayor plans to implement a charge of $10 per day for driving in the downtown area  Payment of this charge will be enforced using a highly sophisticated system that employs digital cameras and computerized automobile registration  This system will not be ready until the end of next year  Without this system, however, mass evasion of the charge will result
Ttherefore, when the mayor' s plan is first implemented, payment of the charge will not be effectively enforced
Raising revenue is a more important consideration for the city than is reducing traffic congestion.