Charging stations for electric vehicles on major highways and commuter car parks in NSW will soon become more common after the state government committed funding for them.

As part of an attempt to encourage a greater uptake of electric vehicles, the government announced $3 million for charging points on major roads, including the Pacific, Princes, Great Western, New England and Newell highways, and $2 million for installing them in commuter car parks.

The government was reluctant to put a figure on how many charging points would be installed, although Transport Minister Andrew Constance said it would be in the "hundreds".

Transport Minister Andrew Constance and Roads Minister Melinda Pavey announce funding for charging points. Credit: Christopher Pearce

"It's about reducing emissions but it's also about reducing the cost for business," he said.