The DCR has published a web site about what they are calling the Neponset River Corridor. This includes the extension of the greenway from Central Ave in Milton out to Mattapan. The site includes news, documents, maps and a gallery of images.
The state recently filed its proposal for the project to the US Department of Transportation which if approved could issue a Tiger grant to provide funding for the project.
You can find the DCR’s Project Vision for the Neponset Greenway here.