Marion County maintains traffic count data on most County roadways. This data
represents the volume of traffic, in both directions, at a particular location
on an average weekday. For most locations, you will find either an actual field
count or an estimate of traffic volume. Questions about the count data should
be directed to Eric Anderson at 503-588-7946. Additional traffic volume information
may be available for some locations.
To search by 'Road Name', type in as much of the road's name as you can in the
empty box beside 'Road Name'. The search is not case sensitive. The more
complete the road name, the narrower the search. Then, either 'click' on the
'Search' button with your mouse or hit 'Enter' on your keyboard.
An example: Typing in 'lanc', will get you the following group of roads:
Blanchet Ave, Lancaster Dr, and Lance Ct NE.
Whereas typing in at least one more letter, 'lanca' will narrow it down to
The 'current' Average Daily Traffic (ADT) count for each count site on
Lancaster Dr will then be displayed arranged in ascending milepost order.
Should you want all the historical ADTs of the Lancaster Dr. count sites,
'click' on the History link.
To search by 'Road Number', type in the road number and suffix road letter, if
applicable. Then either click on the search button with your mouse or hit ENTER
on your keyboard.