Frank Oglesby Jr. used to think his smooth baritone would lead to a career in local radio.

But more than 20 years ago, he happened upon a job with an even larger audience: He became the voice of the Massachusetts Bay Transportation Authority.

If you’ve ever ridden the system, Oglesby’s voice is the one telling you your Red Line train is now arriving or to change here for the Red or Orange Line. Now, after several decades at the MBTA, Oglesby is retiring.

“It really hasn’t hit me yet, honestly,’’ said Oglesby, who was celebrated by friends and colleagues at a retirement party at the agency’s headquarters Friday. “It’s almost as though it’s not really happening.’’

Oglesby, who grew up in Roxbury and Newton, has the MBTA in his blood: His father put his kids through college by driving a bus for the agency for 35 years.

By the time Oglesby graduated from the University of Massachusetts Amherst, he was scouting out jobs at local radio stations like WGBH. But he also applied to become an editorial assistant at the T under the general manager at the time, James O’Leary.

He chose the job at the MBTA in November 1984, when he was 22 years old. He wrote and proofread correspondence for O’Leary as well as the transportation secretary at the time, Fred Salvucci.

Oglesby worked in many capacities at the agency over the decades, eventually rising to his most recent position overseeing the agency’s contracts with the companies that operate the paratransit system, the Ride.

Customer service work was his favorite at the T, but Oglesby’s most public-facing job will always be his announcements on the subway, which he began doing in 1994. At the time, he said, the agency knew it had to start running pre-taped announcements.

“The motormen used to make the announcements, or they wouldn’t — and that was the problem,’’ he said.

If a rider was blind, for example, that person wouldn’t know when to get off the train without the driver making an announcement — and that didn’t comply with federal requirements. To get in line with the law, the T started looking for a voice.

Co-workers already knew Oglesby had a good voice that would soothe customers. When he worked in customer service, he would deal with the “tough cases,’’ getting back to irate riders with substantive information about why, for instance, their bus hadn’t picked them up.

“I had a calm voice and it helped,’’ he said.

That reputation led to managers asking Oglesby to narrate internal training videos — so he seemed to be a natural fit for the announcements.

Before long, his voice — which he said “sounded like a man’’ by age 14 — was booming all over the system.

When his family takes the subway in the city, his children will exclaim, “That’s Daddy.’’ Visitors overhear him while he’s wearing a T lanyard around his neck and recognize his voice.

“My friends make fun of it, too,’’ he said. “They enjoy being on the train and saying, ‘Frank, I heard you all the way in this morning,’ or, ‘If I miss you, I’ll just hop on the Green Line.’ ’’

He hopes he can do more announcements for the agency, even after leaving. But he’s also focused on pursuing even more voiceover work and that radio dream he gave up on years before.

He’s just 54 years old, so he has plenty of time to try. And the MBTA has been the perfect place to hone his skills, he said.

“I’m good with a cold read, and I can run through a page pretty quickly,’’ he said. “I’ve just had so much practice.’’

Transit geeks, rejoice!

Get excited, Massachusetts Bay Transportation Authority data fanatics: It’s now a whole lot easier to download information on how your bus or subway line has been doing.

The MBTA launched a user-friendly data website in March, called mbtabackontrack.com. It displays easy-to-read ridership and daily on-time performance statistics for its subway, bus, and commuter rail lines. Now, officials are making even more information available, including monthly — not just daily — statistics for subway lines, the T’s paratransit service, its ferries, and every single one of the T’s bus lines.

The site goes even further than showing charts: Users can also download Excel spreadsheets that include easy-to-decipher statistics on how well their favorite mode of public transit is running.

Rachel Bain, assistant secretary of the office of performance management and innovation for the T and the state transportation department, said the T needs to show the public that the agency is tracking performance. Officials are paying attention to your commute, so that they can improve it, she said.

“We know when you’re having a bad day, because we’re watching that bad day, too,’’ she said.

The upgrade is part of a more general shift for the agency to become more customer-focused and transparent.

The MBTA previously released scorecards that revealed performance metrics, but those stopped during the record-breaking winters in 2015.

The T also plans to upgrade its main site, at mbta.com, which currently has a layout that can be less-than-ideal on a mobile screen and hard to navigate.

MBTA control board member Monica Tibbits-Nutt, who has focused on customer experience during her time on the board, says she’s “incredibly excited’’ about the new data being available. A transit geek herself, she knows that other planners and T enthusiasts will immediately go to the site to download data.

And for those who aren’t as enthralled with spreadsheets, the site makes measuring ontime performance easier. Instead of just daily statistics, the site includes the monthly or weekly statistics that some are more interested in — and that can help people understand the context of their daily commute.

“People want to know whether their good or bad commute is normal,’’ she said.

The new website isn’t exactly going viral: It averages around 200 to 300 users a day, and about 27,500 users have made more than 35,000 visits to the site since it launched.

But officials say they’ve even heard from other transit agencies — such as the one in Portland, Ore. — about how to replicate such a user-friendly website.

“I can definitively say we’re probably the most user-friendly performance dashboard that exists in transit,’’ said Bain. “We’ve looked.’’

Nicole Dungca can be reached at nicole.dungca@globe.com. Follow her on Twitter @ndungca.