40:56-50.Ā  Contract with state and county for road improvement
The governing body of any municipality in which said improvement is undertaken may, by and with the consent of the state highway commission, enter into a contract with the board of chosen freeholders of the county in which said municipality lies, or with the state highway commission, to pay the entireĀ  additional cost due to said increased width of improvement and paving, whichĀ  contract shall fix and prescribe the time and manner of payment by said municipality of such added cost and expense;Ā  or the said municipality may makeĀ  such improvement in the same manner as improvements are made therein, by itsĀ  governing body, provided, the contract for such improvement shall be approvedĀ  by the state highway commission.

The contract shall not be entered into unless and until the proceedings andĀ  acts for the undertaking of a local or general improvement have been taken andĀ  performed in the manner prescribed by this chapter.
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