I know how the Federal government forced the states to lower the speed limits, but tell me this, how can they force to to enforce the limit?
What if they only write tickets for speeds above 75mph?
Actually the Feds were doing traffic studies and if a certain number of vehicles were exceeding the limit by x amount, the state could lose highway funds. This is much like they do with seat belt usage by monitoring the percentage using seatbelts and thretening and/or penalizing the state if there is not a high enough percentage of compliance.