The ongoing delays for double-berthing in Muni Metro stations continue, as Muni waits for its training plan to be approved by the CA Public Utilities Commission.

After Muni officials demonstrated double-berthing for the CPUC in December, expecting the green light, Muni Operations Director John Haley told Streetsblog that CPUC needed to sign off its training plan, which Muni officials apparently didn’t anticipate. In early February, Haley told us he was in talks with CPUC and hoped to have approvals in place within two to four weeks.

But CPUC spokesperson Terrie Prosper said it was only on March 27, last Friday, that the agency received all of the documentation needed.

“We had already done the training,” said Muni spokesperson Paul Rose, “but the CPUC requested that we get signatures from each operator. We have done that and are awaiting a response.”

“It is too early to provide a date for launch,” he added.

Prosper told us on Wednesday that CPUC would send a written reply “in the coming days” to “allow SFMTA to place the system in service.” Rose said Muni hasn’t received it yet.

The SF Transit Riders Union “has been eagerly awaiting double berthing for quite a long time, and we’re very happy that the SFMTA is ready to move forward,” said spokesperson Reed Martin. SFTRU “urges the CPUC to move quickly and approve the plan, allowing Muni Metro riders to finally experience double berthing in action!”

We also have a few more details on some of the limitations of double-berthing, also known as double-train loading. According to Muni Deputy Director of Operations Jim Kelly, double-berthing will only be possible at Civic Center, Powell, and Montgomery Stations because the platforms at the rest of the stations are too short for two trains to load safely. Each train which loads behind another train will also stop a second time at the front of the platform.