The Massachusetts Department of Transportation Highway Division Layout Section is providing this public interactive map as a service to make available record state highway layout information. Image files of State Highway Layout (SHLO) Plans and accompanying written instruments throughout Massachusetts are available to be viewed or downloaded. This Map displays the approximate location of the plan sheets of state highway layout plans and state highway alteration plans. This map is not intended to be used in any way to precisely locate the baseline or the sidelines of highway layouts. The highways shown on this map are the state highways under the jurisdiction of the Massachusetts Department of Transportation Highway Division. Some MassDOT projects included work outside state highway limits. As a result, other highway/roadway layouts displayed on this map represent portions of other state agency/department/authority roadways, portions of county highways, or portions of municipal roadways. All symbols and line work presented on this map are graphical representations of real-world features and are considered to be approximate only. Highway/Roadway Layout baselines and sidelines should be obtained from record information only and accurately determined by a ground survey under the supervision of a Professional Land Surveyor. The MassDOT Highway Division Layout Section makes every effort to maintain the utmost accuracy of the state highway layout database, though mistakes and omissions can occur. Missing information or comments and concerns may be reported to the Layout Section through the ‘Contact Us’ application under the Tools menu. When reporting an issue regarding a specific layout, please cite all identifying information including Layout number and City/Town. MassDOT claims no responsibility for any damages or liabilities due to the accuracy, inaccuracy, availability, use, or misuse of the GIS and/or layout information herein provided. Source.