In addition to the dread wintry mix and the giant annual anti-abortion march, those of you trying to get around downtown on Friday will also need to contend with a number of Metrobus route alterations. The changes are being put in place to avoid the road closures associated with tomorrow’s March for Life event. From noon to 5 p.m., Metrobus routes 32, 34, 36, 54, 70, 96, P2 and P6 will be detoured around closures at 1st St. NE/SE, between Constitution and Independence Ave. And between 11:30 a.m. to 12:30 p.m., Metrobus routes 32, 34, 36, 42, 54, 63, 64, 70, D6, P2, P6, S2 and S4 will be detoured around the closures along F St. NW, 10th St. Constitution Ave., and 12th St. to the National Mall. Make a note of it.