Extended bus service. A 50% discount at nearby parking garages. Coordination with the Portland Police Department.

Real estate developer Mile Marker Investments and concert giant Live Nation have mentioned all of the above as options to manage the increased flow of vehicle and pedestrian traffic near the proposed Portland Music Hall. If approved, the concert venue would bring 3,300 patrons to the intersection of Cumberland Avenue and Myrtle Street.

The Portland Planning Board is thinking about how to hold the developers to their word.

“There’s a lot of ifs and maybes in the report and in the presentation,” Chairman Brandon Mazer said at a workshop on Tuesday. “I’m trying to figure out how we make sure that they actually happen.”

The planning board did not take a vote on the project Tuesday and continued to ask questions of the developer and of city staff. The workshop was the second on the proposal, and traffic was the primary focus of the discussion. In March, so many people attended the first workshop that City Hall staff had to set up an overflow room, and public comment continued for nearly two hours. Many people, including representatives from local arts organizations and tenants at nearby Merrill Auditorium, raised concerns about how the venue would impact parking and congestion in the area.

In the meantime, the Portland City Council considered a moratorium on the development of large theaters and concert halls in part to study their potential impacts on downtown traffic. City Councilor Wes Pelletier, who proposed that pause with Councilor Anna Bullett, said the idea was not meant to target this one application. The council ultimately referred the matter to the Sustainability and Transportation Committee, which has not yet discussed it.

The application includes off-street parking for up to four tour buses and two tractor-trailers. It does not include any dedicated spaces for visitors or employees. The developer is not required to build a parking lot with this project, but does need to get a traffic permit and submit a plan for transportation demand.

Since the last workshop, the developers have announced a partnership with Muger Enterprises to offer 50% off the hourly parking rate during events and longer hours at two parking garages in Portland. The letter outlining that agreement says the discount would benefit multiple venues, not just the Portland Music Hall.

City staff submitted a report to the planning board in advance of Tuesday’s workshop related to parking and traffic impacts. Mile Marker Investments and Live Nation have pointed to five parking garages or surface lots less than a half-mile from the site. They counted more than 2,800 spaces — not including those on the street or in private lots. This month, the city’s parking division conducted a parking survey that included two or more checks on a Thursday, a Friday and a Saturday. The results showed that the garages are underutilized on nights and weekends during the estimated peak hours for the Portland Music Hall.

“These findings indicate that approximately 80% of parking capacity in the area remains available, suggesting sufficient existing parking to accommodate a new venue,” the report said.

Dan Riley of Sebago Technics, the engineering firm working on this project, said the team looked at garage usage on a September weekend when both the State Theatre and Merrill Auditorium had packed events to find similar availability. They are also working on additional traffic counts.

“The next step is to take the latest counts that we’ll be acquiring here very soon, updating the traffic calculations and then presenting that material to the staff for review,” Riley said.

The developers said they have continued to meet with other parking operators, as well as Greater Portland METRO. Tuesday’s meeting wasn’t as crowded as the last workshop, but more than a dozen people spoke on the project. Several people, including a construction firm that would work on this job, spoke in favor of the project. One resident mentioned the traffic management for Hearts of Pine soccer games and Thompson’s Point concerts as evidence that this project should be approved.

The planning board also heard from Anastasia Contos, owner of Top of the Old Port Parking. She raised concerns about tentative plans to close Pearl Street for weeks during construction, which could block the entrance to the busy surface parking lot. She also asked the board to put restrictions on when tractor trailers can make deliveries because they will block the street as they enter and exit the concert venue.

“Although we do not oppose the project, we are concerned about the impact of the project on our operations, which on an average day support the needs of over 700 individuals coming to the city,” she wrote in a letter to the planning board.

The planning board will meet again on June 10.

“All the tools suggested tonight can work,” Mazer said. “Let’s get them more solidified.”