Traffic data
Average number of vehicles using southbound I-5 at Mercer Street
|
on a weekday |
|
122,000 |
|
on a Saturday |
|
102,000 |
|
on a Sunday |
|
94,000 |
|
on a weekday between
7 a.m.and 8 a.m.
(peak hour volume) |
|
10,000 |
|
on a Saturday between
noon and 1 p.m.
(peak hour volume) |
|
6,800 |
|
on a Sunday between
noon and 1 p.m.
(peak hour volume) |
|
6,600 |
Hourly vehicle capacity
|
of one freeway lane |
|
1,500 |
|
of southbound I-5 through downtown |
|
7,500 (4 mainline + 1 express lane) |
|
|
|
|
|
of southbound I-5 during our
June 24-27
construction weekend |
|
3,000 (1 mainline + 1 express) |
|
of southbound I-5 during our
July 15 - 18
construction weekend |
|
4,500 (2 mainline + 1 express) |
Average number of vehicles using northbound I-5 at Mercer Street
|
on a weekday |
|
100,000 |
|
on a Saturday |
|
91,000 |
|
on a Sunday |
|
83,000 |
|
on a weekday between
4 p.m.and 5 p.m.
(peak hour volume) |
|
6,500 |
|
on a Saturday between
11 a.m.and noon
(peak hour volume) |
|
6,100 |
|
on a Sunday between
noon and 1 p.m.
(peak hour volume) |
|
5,800 |
Lane closures
Southbound I-5
|
Total number of lanes through
downtown Seattle |
|
5 (including express lane, which will be southbound during construction weekends) |
|
Lanes closed during first weekend of
construction (April 22-25) |
|
2 of 5 |
|
Lanes closed during second weekend
of construction (June 17-20) |
|
4 of 5 |
|
Lanes closed during
third weekend
of construction (June 24-27) |
|
4 of 5 |
|
Lanes closed during
fourth weekend
of construction (July 15-18) |
|
3 of 5 |
|
Ramps closed during weekend 1 (April 22-25) |
|
2 |
|
Ramps closed during weekend 2 (June 17-20) |
|
3 |
|
Ramps closed during weekend 3 (June 24-27) |
|
5 |
|
Ramps closed during weekend 4 (July 15-18) |
|
7 |
Northbound I-5
|
Total number of lanes through
downtown Seattle |
|
4 (including express lane, which will be southbound only during construction weekends) |
|
Lanes closed during
construction |
|
0 |
|
Ramps closed during
construction |
|
0 |
Miscellaneous
|
Number of barrels required to close lanes between
Union and Dearborn streets during this weekend (July 15-18) |
|
375 |
|
Number of signs needed to close lanes
this weekend (July 15-18) |
|
30 |
|
Number of signs needed for Howell Street on-ramp detours |
|
75 |
Public Outreach
|
Construction information fliers delivered to nearby residences and business |
|
36,000+ |
|
Construction and noise information fliers delivered to residences and businesses within 500 feet of the project |
|
750 |
Driver Information
|
Number of permanent electronic freeway signs we may use to provide driver information |
|
14 |
|
Number of Highway Advisory Radio transmitters we may use to broadcast driver and project information |
|
8 |
Materials
|
Amount of concrete that crews will pour during this project |
|
5,100 cubic yards or 700 truckloads |
|
Amount of asphalt that crews will remove |
|
6,300 cubic yards or 350 truckloads |
|
Amount of asphalt crews will place under the new concrete |
|
2,400 cubic yards or 80 truckloads |
Jobs
|
Number of construction contractors working on the project |
|
10 (1 prime + 9 subs) |
|
Number of workers employed by these contractors and suppliers during the project |
|
100 to 200 |
|
Number working at any one time during height of weekend closures |
|
50 to 75 |
Financial
|
Projected total cost for design and construction |
|
$5.1 million |
|
Dollar amount of contractor Merlino Construction’s construction bid: |
|
$3.9 million |
How far could traffic back up on southbound I-5 (worst case scenerio)?
|
With two lanes closed
(July 15-18) |
|
9 to 12 miles (as far as the Snohomish County line) |
|
How far could traffic back up on northbound I-5 (worst case scenerio)?
|
With express lanes running southbound all weekend |
|
5 miles (to the north end of Boeing Field) |