then there is karna any val. it's closed between 16th and 24th street. the parade will also close mission street from 24th to 17th. with all these closures, gina will walk this weekend. >> everything says don't drive. we're at third and folsom. >> walking works unless you are 20,000 people that use the n-judah lines. this construction and track replacement has closed the lines for nine days. buses are going to the caltrain station, a time inconvenience to certain passengers. >> they will resume operations june 4th. with the dumbarton closed, alternate is highway 237 to the south and san mateo bridge to the north. dumbarton bridge will reopen tuesday at 5:00 a.m. >> carolyn: so here is a good idea, our waze smart phone app can help you avoid any traffic trouble spots. get the app through itunes or android market. for details go to abc7news.com >> police are out in force this memorial day weekend keeping an eye out foreimpaired drivers. police department says staffing d.u.i. checkpoints all over the bay area. redwood city has four checkpoints. they have ro