Free

Details

  • Released
  • Updated
  • August 30, 2022
  • April 20, 2026

Features

Mass511 screenshot #1 for iPhone
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About

Get real-time traffic updates, incident alerts, and camera views for Massachusetts highways. This app offers hands-free audio notifications and personalized route management to keep you informed while driving.

Hands-free audio notifications
Zoom-enabled map with camera views
Real-time incident and weather updates
Personalized account management
Traffic speed monitoring
Access to traveler resources
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What's New in Mass511

2.8

April 20, 2026

Improvement that shows when work zones are verified as being active

User reviews

Meh

It would help if massdot actually fixed their cameras for once.

Response from developer

Thanks for the feedback. We’re sorry about the frustration with the cameras. If you’re able to share more details about what you’re experiencing, please contact us at feedback@castlerockits.com

Favorites Not Functioning

I do not see a favorite heart icon on the app or browser interface. I didn’t see any info explaining how to add a location on the app but it must be an option as there is a tab where they can be added telling me i should add one :-)

Response from developer

Sorry for the confusion. We appreciate the feedback and are continuing to improve the app to make this clearer and easier to use. Locations can be favorited from the search results screen when you are logged in to your account. Tap the search button at the bottom of the screen and perform a route, place, or roadway search, for example “Boston, MA to Newton, MA.” The screen will update with a map view of your search, and below the “Show Results” arrow you should see a favorite button. Tapping that button will allow you to save the location to your favorites. If you need any help feel free to contact us at feedback@castlerockits.com

Edit: a problem solved

I couldn’t see the map, but once I created an account I could.

Response from developer

Hi, Green Laughter - Thanks for letting us know that you were able to see the map after you created an account. Interestingly, an account is not required to use the Mass511 app, including the map. We're hoping you can provide some additional information in case there's a bug we need to fix. Are you finding that you can only see the map when you're logged in? Any other details you can provide about times you're not able to see the map would be super helpful! If you're willing, please send additional info to pm@castlerockits.com. Thanks!

Can’t see the map

Just white, though I can see info points on the white background.

Response from developer

Hi, Green Laughter - Sorry to hear that you are having troubles with the map. If you continue to have troubles loading the map, then please email us at pm@castlerockits.com with additional details to help us investigate. Are you connecting over WiFi or a cellular network? If cellular, which cellular network provider are you using? Thank you!

Not intuitive

Takes a long time to figure out how to do things in the app

Response from developer

Thank you for your comments - we will continue work to make the app easier to use. Please reach out to pm@castlerockits.com if you have some specific details you'd like to share with us.

Developer apps

FAQ

What is Mass511?

Mass511 is the official traffic and traveler information app for Massachusetts, developed by the Massachusetts Department of Transportation. It provides real-time updates on traffic incidents, construction, weather, and road closures across the state's highways.

Does Mass511 have ads?

No, Mass511 does not contain advertisements. The app is completely free to use and does not display any ads to users.

What devices support Mass511?

Mass511 is available for iPhone and iPad devices. It is designed to provide essential travel information on Apple's mobile platforms.

How often is Mass511 updated?

The latest version of Mass511 is 2.7, which was last updated on March 26, 2026. The app is actively maintained to provide current and reliable traffic information.

Can I get audio alerts with Mass511?

Yes, Mass511 offers hands-free, eyes-free audio notifications for traffic events while you drive. This feature allows you to stay informed without taking your eyes off the road.

What is the age rating for Mass511?

Mass511 has an age rating of 4+. This indicates that the app is suitable for users aged four and older, with no mature content.

How can I save my favorite routes or cameras in Mass511?

You can manage your My Mass511 personalized account to save favorite routes, areas, and camera views. This allows for quick and easy access to the information most relevant to your travel.

What is the user rating for Mass511?

Mass511 has a user rating of 3.5 stars based on 53 ratings. This feedback helps inform ongoing development and improvements to the app.