Route 1 Detour due to Madison/Griggs Closure starting 8am: Route 1 NB: Madison (R) Griggs (L) College (L) Dickinson (R) Madison to regular route. Started Until Route 1 Detour due to Madison/Griggs Closure starting 8am: Route 1 SB: Madison (L) Dickinson (R) College (R) Griggs (L) Madison to regular route. Started Until