Crossings at the International Bridge dropped for the first time in more than a year.
Last month, crossings fell by 4.1% or by over 55-hundred vehicles compared to September of a year ago.
The last time there was a drop in crossings was August of 2017.
Two of the four vehicle classifications dropped including full-fare passenger cars and commuter fare which represents almost 90% of total vehicle traffic on the bridge.
Commercial truck traffic was up by 4.2%.
Year-to-date, crossings are up 5.4%.