Lower car parking fees are to be introduced in Derry for a trial period of up to six months.
In total, 93 car parks operated throughout the North by Roads Service are to charge £1 for five hours parking.
Strabane and Limavady are among the towns included.
The initiative, which comes into operation on Saturday, was first tried over Christmas and New Year.
Regional Development Minister Danny Kennedy said it would help attract more shoppers to towns and cities.
Mr Kennedy said: “Local retailers have told me that they are continuing to operate in a challenging environment.
“This will support both the local economy and their efforts to encourage more shoppers back into towns and cities across Northern Ireland.”
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