Why did those Mass. Pike lane closures end so early?

It turns out officials overestimated how much they’d need one of their cranes and how long its removal from the road would take? The result is the Mass. Pike is back to its full capacity three weeks early. –Keith Bedford/Globe Staff

The Massachusetts Turnpike on Monday morning was back to its normal pace through Boston, with four lanes of traffic open in each direction.

Monday was always supposed to be a turning point for the Commonwealth Avenue bridge project that since late July has disrupted travel on the Massachusetts Turnpike, not to mention on Commonwealth Avenue and the stretch of the MBTA’s Green Line that runs along it.

With the bulk of this year’s bridge work complete, the highway was set to increase Monday morning from last week’s setup of two lanes each way to three lanes through Aug. 28.