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.
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.
| |
Issaquah to
Seattle AM |
Seattle to
Issaquah PM |
| Route |
I-90/I-5 |
I-5/I-90 |
| Peak time |
8:10 am |
5:25 pm |
| Length |
15.5 miles |
15.7 miles |
| Travel time at posted speeds |
15 minutes |
16 minutes |
|
Average Peak Travel Time 2003 |
23 minutes |
22 minutes |
| Average Peak Travel Time 2005 |
26 minutes |
24 minutes |
| Average Peak Travel Time Change, 2003-2005 |
13% |
9% |
| 95% Reliable Travel Time 2003 |
32 minutes |
32 minutes |
| 95% Reliable Travel Time 2005 |
38 minutes |
36 minutes |
| 95% Reliable Travel Time Change, 2003-2005 |
19% |
13% |
| Ratio of Peak Travel Time to Maximum Throughput Travel Time (MT³I) 2003 |
1.2 |
1.2 |
| Ratio of Peak Travel Time to Maximum Throughput Travel Time (MT³I) 2005 |
1.3 |
1.3 |
| Traffic Volume Peak Hour Change |
3% |
5% |
| Duration of Peak Period, 2003 (hours:minutes) |
0:10 |
* |
| Duration of Peak Period, 2005 (hours:minutes) |
1:10 |
0:15 |
| Change (in minutes) |
60 |
* |
* = Speeds did not drop below 35 mph for any siginificant amount of time for this route.