Tomorrow, a construction project on I-395 begins that will affect folks commuting in that area.The westbound, on-ramp from Main Street in Bangor will be closed. The Maine DOT wants folks to know that traffic will be detoured onto Farm Road and Perry Road for a little more than a month. The westbound lanes on the bridge will be open, but will be narrrowed.Once that work is finished, work on the westbound off-ramp will begin. The off-ramp onto Main Street will be closed for 40 days. Those lanes will also stay open and narrowed. Commuters will be detoured to the Joshua Chamberlain bridge from Brewer.