▁around ▁the ▁center ▁of ▁the ▁metropol itan ▁region ▁of ▁São ▁Paulo ▁in ▁an ▁attempt ▁to ▁alle vi ate ▁traffic ▁intensity ▁of ▁tr uck s ▁along ▁the ▁city ' s ▁two ▁rivers ide ▁high ways ▁( P in he iros ▁and ▁T iet ê ). ▁ ▁The ▁Rod o anel ▁is ▁being ▁constructed ▁as ▁a ▁multi - lane , ▁limited - access ▁fre ew ay , ▁with ▁large ▁sections ▁to ▁be ▁built ▁in ▁un occup ied ▁regions : ▁along ▁the ▁edge ▁of ▁for ests , ▁close ▁to ▁resident ial ▁areas , ▁etc . ▁This ▁is ▁in ▁an ▁effort ▁to ▁prevent ▁squ atting ▁and ▁development ▁in ▁environment ally ▁sensitive ▁areas ▁along ▁the ▁route . ▁Const ruction ▁is ▁being ▁carried ▁out ▁in ▁four ▁phases : ▁west , ▁south , ▁east ▁and ▁north . ▁As ▁of ▁mid - 2 0 1 0 , ▁the ▁west ▁and ▁south ▁section ▁have ▁been ▁completed . ▁The ▁beginning ▁of ▁construction ▁on ▁the ▁east ▁section ▁is ▁planned ▁for ▁February ▁ 2 0 1 1 . ▁Due ▁to ▁the ▁rough er ▁terrain ▁and ▁environmental ▁concerns , ▁there ▁is ▁no ▁project ed ▁date ▁for ▁the ▁init iation ▁of ▁construction ▁on ▁the ▁northern ▁section . ▁ ▁Tra vel ▁restrictions ▁ ▁Similar ▁to ▁the ▁Ho y ▁No ▁Cir cul a ▁program ▁in ▁Mexico , ▁São ▁Paulo ▁has ▁implemented ▁restrictions ▁on ▁travel ▁to ▁maintain ▁the ▁quality ▁of ▁air . ▁D ri vers ▁must ▁respect ▁a ▁certain ▁schedule ▁according ▁to ▁the ▁last ▁digit ▁of ▁their ▁car ' s ▁license ▁plate ▁number . ▁ ▁Inter connected ▁roads ▁ ▁References