Check out the city's BRT network plan. You can find it on the council agenda and minutes page, on the agenda for the Jan 19 SPC on land use, planning, and transportation.
I would link, but the links expire quickly.
Highlights:
Short term:
301 enhancements
302 enhancements and extension to South Health Campus
305 extension and enhancements
Airport BRT down centre street
SW crosstown from Westbrook station to Quarry Park (serves MRU) - phase 1 only to Heritage Station
SW woodbine to downtown phase 1
Medium Term:
Brentwood to Saddletowne - serving 16th ave and 52nd street NE
Saddletowne to South Health Campus
SW Westbrook to Quarry Park phase 2
305 enhancements - 17th ave SE corridor enhancements
Downtown to woodbine phase 2
Long Term:
Airport BRT phase 2 - terminal to NE LRT
Sage Hill to Brentwood and to 96th ave NE (connections to NW and NC LRT lines)
Somerset Bridlewood to South Health Campus
162nd Ave SW BRT
