1-481SectionOpenedBy MIKE McANDREWInterstate 481 will grow by 3.6 miles today when a new strip of the highwav is opened between the New York State Thruway Exit 34A in DeWitt and Northern Boulevard in Cicero.The road construction represents nait oi a $41.1 miihon project uiai will eventually connect an existing section of 1-481 between Fulton and North Syracuse with an existing section between Nedrow and the Thruway, said Richard Simberg, state Department of Transportation regional director.Motorists on 481 will be able to bypass Syracuse on the east when the second phase of the project — a 4.9-mile section between Northern Boulevard and North Syracuse — is completed in late 1985.“It will be a major connector when the rest is done,” Simberg said.He said the section of highway that will open today cost $20 million excluding administrative and design fees. The federal govern-ment is paying 90 percent of the cost of the state’s contract withII5flt;nvhgenUu(Iitgeneral contractor S.j. Groves Sons Co. of Liverpool, he said.Workers have been building the four-lane highway between the Thruway and Northern Boulevard since the summer of 1982.Two new traffic signals on Northern Boulevard at the 1-481 on and off ramps were turned on Wednesday in preparation for today’s highway opening. Simberg said he doesn’t expect any traffic problems there as a result of thenew highway.Plans to extend 1-481 in Onondaga County were approved by the state in the early 1960s but the funding was not available then.Construction of the highway extension damaged 22 acres of wetlands, Simberg said, but the DOT worked with the Department of Environmental Conservation to create another 55 acres of wetlands in the Cicero area by changing water drainage patterns:BEAR RD. INTERCHANGEnorthern blvdINTERCHANGECoUamerN.Y.S. THRUWAY INTERCHANGEInterstate 481 Extension3o The section from the Thruway 3 to Northern Boulevard will open about 1:30 p.m. Thursday.......*I1Sa3COUAMER1CDlt;INTERCHANGEpuThru waymmm interstate 481 extension