Even though a commuter rail line through town is not yet a reality, local officials are planning for the day it will be. The planning board met last week to develop rules and regulations in accordance with a bylaw adopted last year to create a planned mixed-use development district in the South Main Street area of Assonet, where a train station will be built. Prior to the overlay district being created, the land was zoned just for general and industrial use. Planning technician Lauren Moreau said the intent of the zoning, as stipulated in the bylaw, is to “promote a lively village atmosphere” and create an attractive place to shop, work, and live. It will also be pedestrian-friendly. Jean Fox, Project Manager for the Massachusetts Department of Transportation’s South Coast Rail, said a projected completion date has not been set, but the project is in “go mode,” and she expects permitting and final design plans will be underway later this year.