The Roswell City Council approved a supplemental agreement Monday with the Georgia DOT to accept state and toll road funding for traffic improvements along Holcomb Bridge Road and Ga. 92. The city is working with the state to install advanced traffic management systems along the east-west routes.

The systems adjust signal timing to provide improved traffic flow. Public works officials estimate the new systems could reduce travel times by as much as 20 percent.

The city now has budgeted $574,000 in its grant account for the projects.