While many consider Antioch the gateway to the Delta, the prevailing features of the area have attracted an influx of new arrivals. Population has continued to rise throughout Contra Costa County, while maintaining an abundance of charm and opportunity. Highway 4 is the major east-west highway serving an average of 112,000 vehicles a day. Contra Costa County, as well as the City of Antioch, has responded with the explosive population growth by taking sufficient measures to alleviate potential congestion problems.