Complex sentence: However, during votes, the House subway is restricted for Members-only also, the Russell Subway is restricted to Members and staff-only (Senate staff tours use the Russell subway to reach the Capitol) during times when the Senate is voting.
Split into simpler sentences: However, during votes, the House subway is restricted for Members-only. Also, the Russell Subway is restricted to Members and staff-only (Senate staff tours use the Russell subway to reach the Capitol) during times when the Senate is voting.