Want help understanding what all the traffic data in the press releases mean? Check out the traffic count graphs that plot the daily changes in hourly traffic volumes on the I-5 and I-205 bridges. They'll show you how drivers are modifying which bridge they use and what time of day they travel during the bridge closure.

On the first day of the closure, for example, the three hour morning southbound traffic volumes went up on I-205, but all of the increase was between 5am and 7 am. The traditional 'rush hour' traffic (7am to 8 am) was down by more than 40%.

We'll be updating these graphs and tables as more data becomes available.

Press the Refresh/Reload button on your browser if the data seems particularlily dated.

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I-5 Northbound PM Traffic Counts
	PM Peak Period Traffic Counts I-5 1 3 - 4 pm 4 - 5 pm 5 - 6 pm Total Baseline 5100 5250 5450 15800 16-Sep 1904 1836 1766 5506 17-Sep 2305 2400 2796 7501 18-Sep 2764 2747 2605 8116 19-Sep n/a n/a n/a n/a Notes: 1 All counts taken at the I-5 bridge.
I-205 Northbound PM Traffic Counts
	AM Peak Period Traffic Counts I-205 1 3 - 4 pm 4 - 5 pm 5 - 6 pm Total Baseline 5300 6600 7150 19050 16-Sep 6035 5333 4671 16039 17-Sep 5988 4042 2 4609 14639 18-Sep 5973 6057 5743 17773 19-Sep n/a n/a n/a n/a Notes: 1 All counts taken at the I-205 bridge. 2 Major 13-car pileup on I-205.

These graphs were prepared by:

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Send questions or comments to webmaster@rtc.wa.gov. Last modified: September 19, 1997