It’s not your imagination. Your Boston commute is getting worse.

Barbara Mayer, a nurse from the South Shore, has been making the same drive to and from the Longwood Medical Area for five years. Today, the trip takes her a good 15 or 20 minutes longer than it used to, an hour and a half compared with 70 minutes, and that’s if there’s no Cape traffic.

“I used to have time to water the flowers when I got home,” she said.

It’s the same story on the North Shore, where the drive into Boston to meet clients sometimes takes etiquette consultant Jodi Smith two hours, twice as long as it did a decade ago. West of the city, in Waltham, the MBTA’s Route 505 morning rush bus to the Financial District is now allotted 63 minutes to arrive. It was allotted 47 minutes in 2007.