Road work on I-395 set to begin Tuesday has been delayed due to weather conditions.The contractor for the project says he expects crews to begin the work either Friday or Monday, March 7th.Once the construction gets underway, the westbound on-ramp from Main St. in Bangor will be closed.Traffic will be detoured onto Farm Rd. and Perry Rd. for about a month. The westbound lanes on the bridge will be open, but will be narrowed.Once that work is finished, work on the westbound off-ramp will begin.The off-ramp onto Main St. will be closed for 40 days. Those lanes will also stay open and narrowed.Commuters will be detoured to the Joshua Chamberlain Bridge.