500,000 residents. Local consumer confidence and a continued immigration of an estimated 28,800 new residents, new capital investments for new construction exceeding $1.11 billion, and the steady growth of professional and health-care services continued to drive much of the county's economic viability. Volusia County's manufacturing sector maintained a steady and stable position within the local economy contrary to the declining trends being experienced elsewhere within Florida. The overall number of manufacturers present within the county increased to over 430 in 2006 and accounted for a large portion of the county's GMP. Manufacturing maintains one of the highest of all average wage levels within the county and generates a higher rate of circulation of economic impact than any other business sector that comprises the local economy. Volusia County's manufacturing sector generated an average annual wage of $37,632 in 2006, well above the county's average annual wage of $32,200 for all workers. Transportation Airports Daytona Beach International DeLand Municipal Airport Massey Ranch Airpark New Smyrna Beach Municipal Airport Ormond Beach Municipal Airport Pierson Municipal Airport Major roads Interstate 95 is the main north–south interstate highway along the east coast of the state. Eight interchanges exist within the county, three of them in Daytona Beach. Interstate 4 is the main east–west interstate highway through Central Florida, but it also serves as the westernmost interstate highway in the county. It contains at least seven interchanges and becomes State Road 400 east of I-95. U.S. 1 is the main local road through eastern Volusia County, running north–south. It served as the main north–south highway in the state and the eastern half of the county until I-95 was built. US 17 is the main local road through western Volusia County, running north–south. US 92, an east–west route, shares a concurrency with US 17 further south in Polk County until branching off onto the International Speedway Boulevard. SR A1A is the scenic coastal alternate route to US 1, which also includes some county road spurs and extensions. SR 40, an east–west road in northern Volusia County enters the county from the Astor Bridge over the St. Johns River and heads east towards Ormond Beach. SR 44, an east–west road in southern Volusia County, enters the county from the Crows Bluff Bridge over the St. Johns River and heads east towards New Smyrna Beach. SR 46, an east–west road on the southwestern corner of Volusia County, enters the