Gov. Tom Corbett is about to unveil a transportation plan funded primarily by nearly $2 billion a year in new taxes on gas stations.

Two people who learned details of the plan told The Associated Press Wednesday that the governor will announce the fine points of the long-awaited initiative next week.

They both spoke on condition of anonymity because Corbett has not publicly disclosed the plan.

A message seeking comment that was left with Corbett's press office wasn't immediately returned.

The proposal would remove a statutory cap on the oil company franchise tax.

The per-gallon tax is applied up to an average wholesale price of $1.25, and the administration says lifting the cap could produce $1.9 billion a year.