The Treasury must respond to the potential impact new coins could have on parking meters, according to the Local Government Association (LGA).
The organisation suggests that councils could face multi-million pound bills in order to make existing meters compatible with thicker 5p and 10p coins.
The Treasury should pay for these upgrades rather than councils, the LGA stated, with the body adding that the bill for English and Welsh councils could hit £5.5 million.
Parking charges are among the costs motorists need to consider when they take to the roads, in addition to products likecar insurance and breakdown cover.
It is thought that 5p and 10p coins could be made 11% thicker from January, as proposals have been put forward to mint them using steel rather than copper.
The cheaper metal could save the Treasury £176 million, according to initial long-term estimates.
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