Pop-up bus startup Bridj launched initial, beta routes, from Coolidge Corner to Kendall Square and Downtown Boston, Monday morning; and its founder is already talking about an expansion to Back Bay.

Bridj founder Matthew George told BostInno Monday afternoon, “Getting people to try something new is always a challenge.” Even still, positive day-one ridership has the 24-year-old “toying” with the idea of adding service to Boston’s Back Bay, potentially immediately.

George said an announcement could come as early as Tuesday. If given the green light, Bridj Back Bay service would likely start by the end of this week or early next.

“Seventy-plus” inaugural customers turned out for Monday’s launch, George said, many of whom came from surrounding areas, like Jamaica Plain. A “slightly smaller number” is expected to ride tomorrow, he added, suggesting Monday’s ridership could have been the beneficiary of opening-day excitement.

Returning customers may get a chance to see Bridj’s data-driven service in action on Tuesday.

To avoid traffic, said George, “minor routing changes” could go into effect between Coolidge Corner and Kendall Square. Any adjustments wouldn’t be “drastic,” he added.

Related: Here’s journalist Scott Kirsner’s review of Bridj on BetaBoston.

At the moment, Bridj buses are scheduled to make 8:10 a.m. and 8:25 a.m. departures out of 40 Centre Street in Coolidge Corner. The earlier departure is set to arrive in downtown Boston, 100 Federal Street, by 8:45 a.m., with the latter pulling into Cambridge’s 250 Kendall Street at 8:50 a.m.

Image via Bridj.com