As communities and suburbs grow , infrastructure and utilities must be able to match and support that growth . In Georgia ’ s suburbs north of Atlanta , progress and population growth has led to gridlock and congestion along Interstates 75 and 575 — known as Atlanta ’ s Northwest Corridor — particularly during rush hour traffic in the mornings and evenings . Recognizing this growing and untenable situation , the Georgia Department of Transportation ( GDOT ) began development on the Northwest Corridor Project ( NWCP ) to improve transportation options and provide relief to the 400,000 residents who drive these crowded highways every day . To take on