(Portland, OR) -- The Portland Bureau of Transportation is offering discounts for safe rides home over the St. Patrick's Day celebration period. That runs from today through Tuesday, 6 p.m. to 2:30 a.m. each day. You can download coupons now from the PBOT website and can be used any evening through Tuesday. The coupons are for rides originating in Portland on Uber, Lyft, and taxis.