Mopac was built for Austin commuters – help us keep it that way! Go to KeepMopacLocal.org and send a clear message to Travis County Commissioners and the Austin City Council to “Keep Mopac Local.” Currently Mopac operates as a local commuter highway, primarily serving local commuters. But a renewed push to connect the southern end of Mopac over to I-35 by way of the proposed SH 45 Southwest highway would make Mopac a western I-35 alternative. Traffic models show the SH 45 SW connector would add 30,000 cars per day to Mopac.