N.J. Stat. Ann. § 27:7-30

The commissioner may reject any or all bids not in accord with the advertisement of specifications, or for any other irregularity, or may reject any or all bids if the price for work or materials is excessively above the estimated cost, or for any other cause. The state highway engineer shall prepare a list of the bids, including any rejected and the cause therefor, and the commissioner shall award the contract to the lowest responsible bidder.