In 2008 Congress roughly doubled* the ceiling for the amount of transit benefit that employees could take pre-tax from $120 a month to $230 a month. Not conincidentally, $230 a month is the amount employers can spend on free parking or parking subsidy for their employees without incurring tax penalties. The bill moved the status quo from the nonsensical position of net encouragement of driving to at least rough parity.
Unfortunately, the law that equalizes it sunsets on December 31st, and it appears unlikely that Congress will renew the tax subsidy in the current climate. Here in the Puget Sound, fares are generally low enough that only PugetPasses for fares of $3.50 and up will be affected: Community Transit intercounty, ferry, and some Sounder riders. But in systems where fares are much higher, it’s a big deal for transit riders.
* The numbers from the linked STB article and the Post article, are off by $5-10. I don’t know if the bill changed before passage or if there was some other sort of error.