2006

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2006 Congestion Report - Bothell to Bellevue

The two graphs below display the percent of days on each route when traffic speeds fell below 35 mph. The darker line shows data for 2005. The lighter line shows data for 2003.

Morning Bothell to Bellevue via I-405 graph displays 2005 data climbing steeply from 6:30 a.m. and peaking at 90% around 7:30 a.m. compared to 2003 data peaking around 70% during the same time. Afternoon Bellevue to Bothell via I-405 graph shows 2005 data peaking at 63% around 4:30 p.m. and at 75% around 5:30 p.m. compared to 2003 data peaking around 40% at 4:30 p.m. and again at 50% around 5:15 p.m.

The graph below displays highway productivity for a specific point along this route. When the line is at 100%, the maximum number of vehicles per hour are travelling through this point. Any time the line dips below 100%, the system is not operating at 100% efficiency.

I-405 at NE 160th St in Kirkland graph shows 2005 data dropping to around 58% between 6 a.m. and 10 a.m. and to a gradual low of 75% at 6:30 p.m. bewteen 3 p.m. and 6:30 p.m. compared to 2003 data of showing a low around 62% between 6 a.m. and 10 a.m. and another low of 80% between 3:15 p.m. and 6:00 p.m.

 

  Bothell to Bellevue AM Bellevue to Bothell PM
Route I-405 I-405
Peak time 7:30am 5:10 pm
Length 16.0 miles 16.0 miles
Travel time at posted speeds 16 minutes 16 minutes

Average Peak Travel Time 2003

35 minutes 28 minutes
Average Peak Travel Time 2005 42 minutes 31 minutes
Average Peak Travel Time Change, 2003-2005 20% 11%
95% Reliable Travel Time 2003 61 minutes 38 minutes
95% Reliable Travel Time 2005 66 minutes 44 minutes
95% Reliable Travel Time Change, 2003-2005 8% 16%
Ratio of Peak Travel Time to Maximum Throughput Travel Time (MT³I) 2003 1.9 1.5
Ratio of Peak Travel Time to Maximum Throughput Travel Time (MT³I) 2005 2.2 1.6
Traffic Volume Peak Hour Change -1% -1%
Duration of Peak Period, 2003 (hours:minutes) 2:25 2:35
Duration of Peak Period, 2005 (hours:minutes) 2:40 3:20
Change (in minutes) 15 45