3.4
23 reviews
Government
5K+
Downloads
Content rating
Everyone
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About this app

The Mass511 app is the Massachusetts Department of Transportation's official traffic and traveler information app. The Mass511 app, new and improved in 2022, provides up-to-date traffic information for interstates, U.S. routes and state highways across Massachusetts.

FEATURES:
• Hands-free, eyes-free audio notifications of traffic events while you drive
• A zoom-enabled map with tappable traffic event icons and surrounding camera views
• Near real-time updates on traffic incidents, construction, weather and road closures
• Manage My Mass511 personalized accounts including saved routes, areas, and camera views and email and text alerts
• View current traffic speeds
• View traffic cameras throughout the state. Sign up for a My Mass511 account to save cameras for easy access.
• Access to additional traveler information resources

NOTE: Continued use of GPS running in the background can decrease device battery life.

The primary responsibility of every driver is the safe operation of their vehicle. While traveling, mobile communication devices should be used only when the motor vehicle is at a complete stop, off the traveled portion of the roadway. Do not text and drive (it's against the law) or use this app while driving.

App developed by Castle Rock Associates https://www.castlerockits.com. For help with Mass511, please visit https://mass511.com/help/index.html.
Updated on
Sep 20, 2024

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info and App info and performance
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

3.4
23 reviews
ⵜⴰⵜⵉⴼ (DZUS)
June 21, 2025
Extra -1 * because the in-app rate button isn't working. Poor information needs an upgrade to gather more accurate results, maybe by letting drivers updating real time constructions, closures...just like Waxe before. Most of the cameras are off, so you vannot check real time traffic. It doesn't show up small ramp work or exit closure. So, you find yourself blocked in traffic or heading to somewhere else rather than your initial destination.
1 person found this review helpful
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Castle Rock ITS
June 30, 2025
We are really sorry for the trouble and we appreciate you bringing these issues to our attention. We will look into this further!
Susanne Stuart
October 10, 2024
It does the job, but it's hard to see where the traffic is. When the app opens, sometimes it's difficult to figure out exactly what part of the map is being displayed. The old SigAlert app made incidents and traffic conditions much easier to see, with an interactive feature that allowed a user to select an incident and learn what lane it was in, and exactly where it was. Unfortunately, SigAlert isn't available for the later version of Android on my new phone.
3 people found this review helpful
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Castle Rock ITS
October 14, 2024
Hi, Susanne - thank you for your feedback! This is very helpful as we continue to improve the system.
TD West
July 24, 2025
Cant add locations. Instrucfions say to tap on the gear icon on main page to open favorites to add locations. My version 5.7.33 has no gear icon anywhere. edit. now able to add locations. The information that is on the map is pretty useless as you cannot zoom in close enough to tell what roadway the symvbol actually relates to.
1 person found this review helpful
Did you find this helpful?
Castle Rock ITS
June 30, 2025
Hi, TD - Start by tapping the "My Mass511" button in the bottom of screen navigation bar to create an account or log in to an existing account. Then, you can search for a location or a trip between 2 locations and tap the "FAVORITE" button that displays in the results tray. For further assistance, please email pm@castlerockits.com.

What’s new

Added ability to view winter road conditions in a new layer

App support

About the developer
Castle Rock Associates Inc.
pm@castlerockits.com
830 NE Holladay St Portland, OR 97232 United States
+1 503-506-0950

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