Sales of motor vehicles fell 9.8 percent from the year before and fell 20.9 percent from December.
Singapore, one of the world's most expensive places to own a vehicle, announced in October last year that it would not allow any growth in its car population from February, citing the city-state's land scarcity and billions of dollars in planned public transport investments.
The on-year fall was also attributed to the Lunar New Year holidays, which fell in January last year but was celebrated February this year, Singapore Department of Statistics said in a press release.
On a month-on-month and seasonally adjusted basis, total retail sales fell 5.4 percent in January after rising a revised 0.6 percent in the December.
(Reporting by Fathin Ungku; Editing by Sam Holmes)
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