The Greater Boston Chamber of Commerce’s “City to City” program sets out to take Boston civic and business leaders to other cities so they can expand their thinking on challenges at home by learning about policies and practices elsewhere. Walsh, who was part of the program’s trip earlier this month to Los Angeles, has clearly taken that mission to heart.

Appearing on The Codcast, Walsh repeatedly pointed to the “bold” move taken by Los Angeles leaders, who brought a countywide ballot question to voters asking them to raise the local sales tax to support major investments in the region’s transit infrastructure.

“That’s a bold idea,” Walsh said of the LA ballot effort. “We have to think bold here in Massachusetts, and I don’t think we think bold enough.”