If you’re planning on riding Metrobus this weekend, you’ll need to contend with some re-routing due to three festivals about town. The National Capital Barbecue Battle, the Peace in the Streets Parade & Festival, and the 13th Annual Columbia Pike Blues Festival will alter some 17 bus routes, including many on the 30 line. On the bright side, if you’re attending the Blues Festival, your ride on routes 16B, 16G and 16J between noon and 9 p.m. are on the house. Just to be safe, we recommend checking the TripPlanner before blindly hopping on a cross-town bus for the next couple of days.