Dozens of Boston-area bus stops finally give you ETAs

State of play: 76 solar-powered, electronic signs have gone up at stops along the Green Line's B, C and E lines under a $3.4-million contract between the MBTA, E Ink and Mercury Innovation.

• By late 2025, the MBTA expects to have roughly 200 of these electronic signs installed.

How it works: E Ink's signs have a paper-like display similar to Amazon's Kindle e-readers, so they're readable even on a sunny day.

• Mercury Innovation installs ePaper signs that rely on solar power, capturing roughly 20% of light.

By the numbers: In a given week, a solar panel at a bus or train stop has generated the equivalent of 13.65 hours of light from a 100-watt incandescent light bulb, the companies say.

• They say the ePaper signs use so little energy that they'll keep running throughout Boston winters.

Zoom in: Crews recently installed them at 51 more stops on the E and B branches, including the entire stretch of the E branch that runs above ground to Heath Street.

• The project also includes dozens of bus stops in Boston, Everett, Chelsea, Lynn, Belmont and Watertown.

A few highlights:

🦁 Franklin Park Zoo (Blue Hill Avenue and Ellington Street)

🎶 Near Brighton Music Hall (Brighton Avenue across from Quinton Avenue)

🎓 Near Roxbury Community College (Tremont Street across from Roxbury Crossing)

📚 Copley Square (Saint James Avenue and Dartmouth Street)

What's next: Crews will install 40 more signs at bus stops and bus shelters over the summer, per E Ink.