Downtown Dallas drivers will find things a little smoother getting off Woodall Rodgers Freeway today.  The west-bound Saint Paul Street exit ramp is now re-opened after being closed for eight months while crews work on the deck park that will eventually span the freeway to link the Arts District with Uptown.  However, Tx-DOT says this new exit ramp is just temporary and it’s not open to big rigs.  It’ll likely be the end of the year or early 2011 before the permanent ramp is ready.