Recently completed major road projects include the widening of Abernathy Road between Johnson Ferry and Roswell Roads from two lanes to four plus a road median. The western intersection has been reconfigured so that traffic to and from Johnson Ferry Road − which carries heavy loads of Cobb County commuters across the Chattahoochee River at rush hour − now flows directly with Abernathy to and from the northwest. Additionally, the Roswell Road bridge over I-285 has been widened to add a turn lane in each direction. There had previously been talk of a tunnel under the freeway to bypass the highway interchange altogether, however this proved to be much too expensive. Another state project is the addition of a half-diamond interchange to Georgia 400 on the north side of Hammond Drive, allowing southbound traffic to exit and northbound traffic to enter the highway. (Ramps on the south side were not possible due to the proximity of the 400/285 interchange.)