Keep your eye out this weekend for some tweaks to WMATA’s Trip Planner tool, which are set to launch on Saturday. Among the changes, according to Metro: The Trip Planner will now recognize abbreviated street directional indicators, such as S, or S. for South.Under the “Advanced” link, the Trip Planner will now allow address searches to be restricted to one of Metro’s compact jurisdictions, instead of searching the entire Metro service area.Search data will…