Under this proposal, a person who buys a pay-per-ride MetroCard would be charged $2 to ride the subway or bus during the morning and evening peak periods. Travel during off-peak periods, including midday, would cost $1.50.
Off-Peak Discounts May Be Part of M.T.A. Fare Increase - City Room - Metro - New York Times Blog

I think that the MTA has figured out how to sell peak-pricing to the masses. Rather than start off by raising the peak-price; lower the non-peak price. Market forces will work to shift some peak use to non-peak use as well as increase non-peak use. I like this. And I’d like to see the MTA try this on the bridges. Or see NJ try this on the Turnpike and Garden State Parkway.