The nation’s first all-electric tugboat has docked at the Port of San Diego and expects to begin emissions-free operations in about a month.

The California Public Utilities Commission has approved a program that will see San Diego Gas & Electric build 3,000 electric vehicle charging stations for medium- and heavy-duty vehicles including school buses, delivery trucks and forklifts, and SDG&E customers will be the ones to pay for it.

A review conducted by the San Diego Union-Tribune showed various state agencies have committed $2.46 billion in public funds — some of it already spent and the rest planned over a number of years — for programs aimed at luring drivers out of cars and trucks powered by internal combustion engines and encouraging them into zero- or low-emission vehicles.

The California Legislature and Gov. Jerry Brown just passed a bill that will plow $52.4 billion in taxes and fees aimed at shoring up California’s freeways, roads and bridges.