Canada started to change to the metric system around 1970 . Cars did not have speedometers that were in kilometers until 1974 .So your car would still have the same speedometer as an American car . GM did sell stickers that you could change your speedometer to km s per hour . This was done by taking the speedometer out of the dash and putting it on the speedometer face and it had both km s and mph on it . We did not change the road signs till 1975.
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