Apr 25, 2016 - 6-7 AM. 67. 6-7 AM. 149. 9-10 AM. 1,068. Central Ave Mainline. 7-8 AM. 230. 7-8 AM. 259. University Ave M
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I-80/GILMAN STREET INTERCHANGE IMPROVEMENT PROJECT
WELCOME TO THE OPEN HOUSE! INTERCHANGE IMPROVEMENT PROJECT
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PROJECT BACKGROUND Background Over the years, the City of Berkeley has completed numerous studies to identify the improvement needs for Gilman Street in the vicinity of the I-80 interchange. »A » combination of freeway congestion, inefficient roadway geometries, increased rail traffic and changes in land use contribute to the heavy traffic congestion in the project area.
»The » city’s development in recent years has generated additional traffic accessing the I-80 freeway through Gilman Street.
»The » Union Pacific railroad track crosses Gilman Street at 3rd Street, two blocks from the I-80/Gilman Street ramp intersections. The increase in rail traffic impedes local traffic circulation, and causes delays at the Gilman Street and 3rd Street at-grade crossing.
»The » existing five-leg and six-leg stop-controlled intersections at the interchange cannot efficiently clear the traffic movements, resulting in substantial delay in the project area.
Previous Studies West Berkeley Parking and Circulation Study (1998)
West Berkeley Circulation Master Plan Report (2009)
Analyzed parking and circulation deficiencies in the area bounded by Cedar Street, Sixth Street, University Avenue and Eastshore Highway.
The City of Berkeley issued the Master Plan for the west Berkeley area including the I-80/Gilman Street interchange’s operating conditions, including bicycle and pedestrian travel.
Recommendation: Outline possible solutions to improve traffic flow at the Eastshore Highway and West Frontage Road in the interchange area.
Findings:
Gilman Street Interchange Improvement Study (2005) Further analyzed the roadway circulation and provided recommendations for interchange reconfiguration. Findings: A dual roundabout design with a connecting segment between the I-80/Gilman Street intersections would provide the most benefit and was considered the most viable alternative to improve traffic flow while meeting safety, accessibility and mobility needs.
Draft Project Study Report (PSR) (2005) Suggested that the dual roundabout design was the most viable solution to achieve acceptable levels of service without any modifications to freeway structures. Recommendation: Conduct additional analyses to address the operational issues.
INTERCHANGE IMPROVEMENT PROJECT
» » Gilman Street interchange is an area of concern » » The Gilman Street interchange and adjacent frontage roads experienced congestion and delay during all periods of the day and all days of the week. » » The at-grade rail crossing near the interchange also added to vehicle queuing when rail activity blocked the roadway.
Project Study Report-Project Development Support (PSR-PDS) (2014) This study evaluated four alternatives including a no-build alternative. Findings: Alternative 3, a double roundabout with by-pass lanes, is the only alternative that will provide acceptable level of service for the design year (2040).
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PROJECT PURPOSE AND NEED Project Purpose The purpose of the proposed project is to: Simplify and improve the navigation, mobility, and traffic operations at the I-80/Gilman Street Interchange. Reduce congestion, vehicle queues and conflicts at the I-80/ Gilman Street Interchange. Improve local and regional bicycle connections and pedestrian facilities through the I-80/Gilman Street interchange. Improve safety for all modes of transportation.
0
80
160
320 FEET
Project Need I-80 is a 10-lane freeway that extends through the Berkeley/ Gilman Street area. Gilman Street is classified as a major arterial with a posted speed limit of 25 miles per hour and is designated as a truck route. Vehicular traffic on Gilman Street is comprised of commuter, local and commercial truck traffic. Traffic controls along Gilman Street include pavement markings, with turn channelization at the 6th, 8th, and 9th Street intersections only. The I-80/Gilman Street Interchange is a four-lane arterial roadway (Gilman Street), with two lanes in the east/west direction that are intersected with four I-80 on- and off-ramps, an existing frontage road, and Eastshore Highway. Traffic controls on all approaches to Gilman Street consist of stop signs and pavement markings. These conditions, along with an overall increase in vehicle traffic, have created the need to address the poor and confusing operations in the interchange area. In addition, other needs related to modal interrelationships and social considerations have been identified, including closing the gap in the Gilman Street and regional San Francisco Bay Trail bikeway system in the area, and providing safe pedestrian and bicycle access to and from the project study area.
INTERCHANGE IMPROVEMENT PROJECT
0
80
160
320 FEET
4a
TRAFFIC CONDITIONS Turning Movement and Average Daily Traffic Counts ADT COUNTS 24-hour classification counts were collected at three locations along Gilman Street: ADTSeven-day, SUMMARY
MAP Kains
• Gilman Street, between I-80 ramps A. Gilman St (Between I-80 • B. Gilman St between (Between C. and Gilman (Between Gilman Street, Second Street FourthStStreet Ramps) andbetween FourthSeventh St) Seventh St and Eighth St) • Second Gilman St Street, Street and Eighth Street
Ave.
St. 10th
St. melia
Page
80
5,890
12,973
8,239
8,786
17,025
1/25/2016
Monday
9,066
7,487
16,553
1/26/2016
Tuesday
9,386
7,536
16,922
1/27/2016
Wednesday
9,676
7,516
17,192
1/28/2016
Thursday
9,567
7,740
17,307
8,950
7,030
15,981
0 (2)
1 (2)
Gilman St.
0 (4)
1 (1)
0 (2)
2nd St.
0 (1)
3 (3)
»» This table shows a sample plot of hourly volumes aonGilman Street between I-80 ramps on Wednesday, January 27, 2016. The westbound direction peaks between 7:00-9:00 a.m., and the eastbound direction peaks between 3:00-7:00 p.m are plotted.
Ave.
son Harri
y.
11
St.
123
10
13
St.
t.
8th S
t.
t.
t.
Pedestrian Crossing Volume
80
5th S
PM Peak Hour Ped/Bike Volumes
5
t. 4th S
AM Peak Hour Ped/Bike Volumes
age
XX (XX)
nt WFro Rd.
N
2
4
6
t. 6th S
. St
LEGEND
3
an Gilm St.
7th S
an lm
7
9
11
10th
8
9th S
t. 2nd S
Gi
St. 10th
t.
t.
8th S
t.
t. 6th S
Freeway and Ramp Counts 12
t.
t. 4th S
5th S
7th S
t.
age
nt WFro Rd.
t.
1 (0) 3 (2)
1 (1) 7 (8) 0 (1)
4 (9)
Harrison St.
6 (29)
1
elia S
Cam
80
9th S
2nd S
. St LEGEND Signalized Intersection Stop Control XX AM Peak Hour Volumes (XX) PM Peak Hour Volumes
2
5
4
6
1 (1) 13 (5) 2 (1)
4 (7) 3 (1)
1 (0) 7 (7) 1 (0)
13 (8)
7 (10)
0 (1) 11 (4) 2 (0)
2 (1)
1 (2) 2(1)
Harrison St.
12 (14)
2nd St./ Harrison St.
7 (2)
1 (2) 1 (0) 1 (5) 0 (1)
13
10th St./ Gilman St.
29 (40)
18 (13)
1 (0)
Eastshore Hwy./ Harrison St.
10
Gilman St.
8 (15)
29 (46)
1(1) 7 (2)
5 (2)
3 ( 2)
4 (5) 0 (3)
0 (1)
0 (1) 2 (6)
2 (8)
12
2 (1) 12 (6)
Gilman St.
2 (3)
San Pablo Ave./ Gilman St.
29 (25) 3 (14)
1 (1) 8 (6)
Gilman St.
1 (4)
9th St./ Gilman St.
9
8th St.
0 (1) 9 (7) 6 (2)
21 (29)
8th St./ Gilman St.
7 (3)
6 th St.
0 (1) 4 (0) 1 (0)
8
0 (1) 0 (5)
13 (7)
0 (1) 1 (3)
ore Hw
y.
an
lm
Gi 1
3
an Gilm St.
13,950
0 (3) 5 (4)
Gilman St.
8 (8)
Eastsh
ore Hw 10
7
6,884
2 nd St.
1 (4) 2 (1) 0 (1) 4th St.
17 (6)
10 (5)
3 (11) 0 (1)
6th St./ Gilman St.
7
5 (5)
0 (1) 6 (3)
18 (40)
Gilman St.
1 (5)
1 (1)
1 (3)
123
9
7,066
4 (9)
Ave.
Eastsh
n St.
8
15,708
(BETWEEN I-80 RAMPS) ADT COUNTS, WEDNESDAY, 1/27/2016
2nd St./ Gilman St.
5
4 (2) 7 (2)
0 (1)
Gilman St.
7 (3)
12 (10)
Gilman St.
so Harri
12
7,856
Figure 4: Hourly VOLUMES Volumes at Gilman Street (between I-80 Ramps) HOURLY AT GILMAN STREET
6 (16)
9th St.
5 (2)
9 (17)
Eastshore Hwy.
6 (14)
Eastshore Highway/ Gilman St.
4
0 (1) 6 (7) 0 (2)
Gilman St.
I-80 EB Off - Ramp/ Gilman St.
12 (10)
0 (2) 2 (2) 4 (0)
3
I-80 EB Off - Ramp
W. Frontage Rd.
6 (4)
Gilman St.
23 (36) 9 (4) 15(33)
10th St.
25 (21) 296 (465) 90 (60)
25 (27) 21 (27) 25 (43)
2 (2)
25 (32) 525 (450) 13 (8)
Gilman St.
47 (90) 11 (15)
I-80 WB Off - Ramp/ Gilman St.
2
4th St./ Gilman St.
6
11
13
7,852
Figure 4 shows a sample plot of hourly volumes at Gilman Street between I-80 ramps on Wednesday, January 27, 2016. At this location, the WB direction peaks between 7:00-9:00 a.m., and the EB directio peaks between 3:00-7:00 p.m.
2 (5)
9 (11) 0(2) 5(4)
10th St./ Gilman St.
23 (38) 7 (18) 17 (26)
26 (21) 512 (471) 31 (32)
Table 2: ADT Summary
A. Gilman St (Between I-80 B. Gilman St (Between C. Gilman St (Between Ramps) Second St and Fourth St) Seventh St and Eighth 8,412 10,313Volume 18,725 7,601(Vehicles) 14,805 (Vehicles)7,204 Volume Volume (Vehicles) Day EB WB EB WB Total EB WB Tot Date Total 8,328 Friday11,044 9,851 19,372 7,920 11,194 15,084 1/22/2016 6,889 7,164 16,740 8,687 19,881 7,757 8,148 15,9 1/23/2016 Saturday 8,024 6,153 14,177 8,833 10,198 19,031 7,852 7,856 15,7 1/24/2016 5,890 7,441 12,973 8,239 17,025 7,066 6,884 13,9 8,447 Sunday 11,452 7,083 19,899 7,967 8,786 15,408 1/25/2016 Monday 9,066 7,487 16,553 8,412 10,313 18,725 7,204 7,601 14,8 1/26/2016 Tuesday 9,386 7,536 16,922 8,328 11,044 19,372 7,164 7,920 15,0 8,566 Wednesday 10,949 9,676 19,515 7,964 11,452 15,389 1/27/2016 7,516 7,425 17,192 8,447 19,899 7,441 7,967 15,4 1/28/2016 Thursday 9,567 7,740 17,307 8,566 10,949 19,515 7,425 7,964 15,3 Average 10,562 8,950 7,030 7,416 15,981 8,502 19,064 7,416 7,763 15,1 8,502 19,064 7,763 10,562 15,178
ablo San P
52 (186) 4 (1)
7,083
1 (4)
ablo
119 (203) 352 (1,020) 12 (34)
Sunday
0 (1)
10
Gilman St.
Harrison St.
6 (6) 3 (2)
1/24/2016
1 (6) 2 nd St.
38 (131) 2 (45) 24 (46)
29 (25) 638 (472) 8 (5)
9th St.
30 (12) 0 (7) 342 (115) 9 (22) 17 (58) 14 (19)
25 (10) 724 (1,073) 6 (1)
2nd St.
119 (461) 33 (167) 43 (122) 16 (32) 52 (28)
19,031
W. Frontage Rd./ Gilman St.
1
Gilman St.
9th St./ Gilman St.
60 (74) 361 (453) 35 (17)
10,198
PEDESTRIAN AND BICYCLE VOLUMES Existing Conditions PedestrianWEDNESDAY, and Bicycle Volumes 1/27/2016
2nd St./ Gilman St.
5
24(104) 711 (975) 10 (5)
Gilman St.
8,833
Figure 1
2nd St./ Harrison St.
13
Harrison St.
Eastshore Hwy.
335 (83) 126 (13) 48 (19) I-80 EB Off - Ramp 8th St.
19 (24) 558 (551) 11 (3)
18 (28) 424 (507) 24 (10)
16 (22)
445 (88) 9 (4)
22 (66) 360 (304) 39 (41)
9
Gilman St.
Eastshore Hwy./ Harrison St.
27 (77) 621 (434) 285 (78)
63 (60) 32 (20) 27 (48)
20 (15) 552 (572) 77 (55)
Gilman St.
14,177
Study Intersection Railroad Track
Eastshore Highway/ Gilman St.
353(856) 733 (398)
8th St./ Gilman St.
8
33 (23) 58 (32) 18 (24)
76 (48) 197 (70) 15 (10)
6th St./ Gilman St.
22 (30) 412 (393) 99 (63)
4
6,153
Average
San P
64 (144) 269 (319) 82 (117)
47 (517) 578 (431)
Gilman St.
12
Gilman St.
Gilman St.
Eastshore Hwy.
32 (48) 0 (0) 20 (37) San Pablo Ave.
171 (114) 982 (777) 70 (113)
San Pablo Ave./ Gilman St.
378 (152) 231(193)
6 th St.
8 (12) 0 (0) 41 (452)
7
I-80 EB Off - Ramp/ Gilman St.
3
47 (629) 9 (15)
4th St.
17 (17) 544 (451) 69 (23)
I-80 WBOff - Ramp
Gilman St.
3 (3) 724 (1,018) 26 (11)
Gilman St.
11
9 (10) 110 (117) 951 (256)
4th St./ Gilman St. 27 (36) 0 (5) 2 (1)
6
694 (235) 219 (3) 402 (304)
W. Frontage Rd.
2 (4) 0 (4) 6 (11) 4 (1) 15 (172) 6 (21)
I-80 WB Off - Ramp/ Gilman St.
8,024
Eastshore Hwy.
N
San Pablo Ave.
Rd.
Gilman St.
2
Saturday
I-80 WBOff - Ramp
St.
0 (1) 4 (6) 0 (1)
e ontag
Ave. ablo
W Fr
W. Frontage Rd./ Gilman St.
1/23/2016
St.
LANE GEOMETRY, CONTROLS & TURNING MOVEMENT WEDNESDAY, 1/27/2016 Existing Conditions Lane Geometry, Controls & Turning Movement Volumes 1
6,889
St.
San P
St.
Jones
9,851
DataVolume were collected using tubes in 15-minute intervals. The detailed data are attached in Appendix A. (Vehicles) Volume (Vehicles) listed in Table 2. ADT volumes Total The collected EB data are WBsummarized Totalinto average EB daily traffic WB (ADT), as Total along the Gilman Street varied between approximately 15,000 vehicles to 20,000 vehicles at the above locations. 11,194 16,740three 8,687 19,881 7,757 8,148 15,905
Ca
Jones
Page
Friday
12 (6)
t. 8th S
t. 6th S
t. 4th S
t. 5th S
t.
t. 7th S
S an
t. 9th S
t. 2nd S
lm
7
5
1/22/2016
8(6)
. re Hwy
Gi 1
9
8
4
3
2
11
10
6
Day
n St.
a
Gilm 13
12
Date
123
16 (10)
o Eastsh
n St.
so Harri
Volume (Vehicles) EB WB
10th St.
Vicinity Map
ia St.
N
el Cam
Bicycle Turn Movement Volume
AM PEAK PERIOD (5:00-10:00 A.M.) (MIXED FLOW + HOV) Figure 2
PM PEAK PERIOD (3:00-7:00 P.M.) (MIXED FLOW + HOV) Figure 3 Figure 6: Freeway and Ramp Counts – PM Peak Period (3:00-7:00 p.m.) (Mixed flow + HOV)
I-80 EB
I-80 WB Cleveland Ave Central Ave Off-Ramp 5-6 AM 191 6-7 AM 261 7-8 AM 449 8-9 AM 514 9-10 AM 498
Central Ave Mainline 5-6 AM 4,921 6-7 AM 7,095 7-8 AM 6,284 8-9 AM 5,093 9-10 AM 4,977
Central Ave On-Ramp 5-6 AM 132 6-7 AM 229 7-8 AM 276 8-9 AM 320 9-10 AM 310
Gilman St Off-Ramp 5-6 AM 240 6-7 AM 492 7-8 AM 1,081 8-9 AM 1,303 9-10 AM 1,194
I-580
Cleveland Ave Off-Ramp 5-6 AM 67 6-7 AM 155 7-8 AM 343 8-9 AM 264 9-10 AM 297
On from I-580 EB 5-6 AM 1,192 6-7 AM 1,940 7-8 AM 2,774 8-9 AM 2,803 9-10 AM 2,506
Buchanan St On-Ramp 5-6 AM 141 6-7 AM 318 7-8 AM 754 8-9 AM 921 9-10 AM 559
University Ave Mainline 5-6 AM 5,980 6-7 AM 9,386 7-8 AM 9,051 8-9 AM 8,023 9-10 AM 7,612
Gilman St On-Ramp 5-6 AM 141 6-7 AM 233 7-8 AM 454 8-9 AM 510 9-10 AM 419
Central Ave Off-Ramp 3-4 PM 479 4-5 PM 541 5-6 PM 626 6-7 PM 626 7-8 PM 544
Off to I-580 WB 3-4 PM 2,979 4-5 PM 3,454 5-6 PM 3,792 6-7 PM 3,071 7-8 PM 2,066
N Central Ave Mainline 3-4 PM 5,514 4-5 PM 5,477 5-6 PM 5,314 6-7 PM 5,283 7-8 PM 5,716
I-580
Buchanan St Off-Ramp 3-4 PM 499 4-5 PM 466 5-6 PM 512 6-7 PM 608 7-8 PM 616 Buchanan St On-Ramp 3-4 PM 355 4-5 PM 372 5-6 PM 323 6-7 PM 332 7-8 PM 265
Gilman St Off-Ramp 3-4 PM 289 4-5 PM 215 5-6 PM 229 6-7 PM 265 7-8 PM 324
Gilman St On-Ramp 3-4 PM 928 4-5 PM 1,120 5-6 PM 1,129 6-7 PM 859 7-8 PM 522
University Ave Mainline 3-4 PM 8,313 4-5 PM 8,022 5-6 PM 7,780 6-7 PM 7,831 7-8 PM 7,785
University Ave Off-Ramp 3-4 PM 679 4-5 PM 580 5-6 PM 587 6-7 PM 713 7-8 PM 826
I-80 EB
I-80 EB
I-80 EB
I-80 WB
I-80 WB
I-80 WB Cleveland Ave
University Ave On-Ramp 5-6 AM 277 6-7 AM 472 7-8 AM 619 8-9 AM 658 9-10 AM 513
University Ave Off-Ramp 5-6 AM 258 6-7 AM 510 7-8 AM 667 8-9 AM 718 9-10 AM 661
University Ave On-Ramp 3-4 PM 1,004 4-5 PM 1,000 5-6 PM 1,285 6-7 PM 1,058 7-8 PM 723
University Ave
University Ave Mainline 5-6 AM 2,353 6-7 AM 4,395 7-8 AM 6,695 8-9 AM 6,743 9-10 AM 6,533
University Ave Off-Ramp 5-6 AM 228 6-7 AM 519 7-8 AM 887 8-9 AM 1,214 9-10 AM 1,068
Central Ave On-Ramp 3-4 PM 583 4-5 PM 507 5-6 PM 507 6-7 PM 492 7-8 PM 563
Gilman St
I-580
Gilman St On-Ramp 5-6 AM 91 6-7 AM 149 7-8 AM 259 8-9 AM 397 9-10 AM 441
University Ave On-Ramp 5-6 AM 95 6-7 AM 186 7-8 AM 467 8-9 AM 620 9-10 AM 465
Buchanan St
Central Ave Mainline 5-6 AM 1,094 6-7 AM 2,099 7-8 AM 3,566 8-9 AM 3,806 9-10 AM 3,871
Buchanan St On-Ramp 5-6 AM 26 6-7 AM 67 7-8 AM 230 8-9 AM 338 9-10 AM 229
Gilman St Off-Ramp 5-6 AM 160 6-7 AM 212 7-8 AM 318 8-9 AM 339 9-10 AM 383
Central Ave
Central Ave
N
Buchanan St Off-Ramp 5-6 AM 51 6-7 AM 129 7-8 AM 400 8-9 AM 450 9-10 AM 476
University Ave
Off to I-580 WB 5-6 AM 1,078 6-7 AM 1,856 7-8 AM 2,897 8-9 AM 3,150 9-10 AM 2,745
Gilman St
Central Ave Off-Ramp 5-6 AM 58 6-7 AM 100 7-8 AM 234 8-9 AM 322 9-10 AM 361
Buchanan St
Central Ave On-Ramp 5-6 AM 87 6-7 AM 146 7-8 AM 322 8-9 AM 364 9-10 AM 315
Central Ave Off-Ramp 3-4 PM 504 4-5 PM 501 5-6 PM 516 6-7 PM 492 7-8 PM 344
Central Ave Mainline 3-4 PM 4,349 4-5 PM 4,178 5-6 PM 3,946 6-7 PM 3,716 7-8 PM 2,990
Central Ave On-Ramp 3-4 PM 328 4-5 PM 286 5-6 PM 265 6-7 PM 281 7-8 PM 273
Gilman St Off-Ramp 3-4 PM 879 4-5 PM 1,090 5-6 PM 738 6-7 PM 551 7-8 PM 449
I-580
Cleveland Ave Off-Ramp 3-4 PM 320 4-5 PM 344 5-6 PM 376 6-7 PM 329 7-8 PM 181
On from I-580 EB 3-4 PM 2,789 4-5 PM 3,288 5-6 PM 3,477 6-7 PM 2,968 7-8 PM 2,045
Buchanan St On-Ramp 3-4 PM 454 4-5 PM 497 5-6 PM 430 6-7 PM 362 7-8 PM 350
University Ave Mainline 3-4 PM 6,435 4-5 PM 6,536 5-6 PM 5,866 6-7 PM 6,042 7-8 PM 5,623
Gilman St On-Ramp 3-4 PM 333 4-5 PM 299 5-6 PM 257 6-7 PM 279 7-8 PM 248
University Ave On-Ramp 3-4 PM 644 4-5 PM 691 5-6 PM 798 6-7 PM 798 7-8 PM 652
University Ave Off-Ramp 3-4 PM 563 4-5 PM 540 5-6 PM 677 6-7 PM 787 7-8 PM 948
Page 10
INTERCHANGE IMPROVEMENT PROJECT
Page
4b
TRAFFIC CONDITIONS Traffic Time Data »» The bottleneck in the westbound (WB) direction in the morning is the I-80/I-580/I-880 maze. It is mainly caused by high traffic demand and extensive weaving activities. »» The bottleneck in the eastbound (EB) direction in the evening is the I-80/I-580 split due to high traffic demand as well as merging and diverging activities. This bottleneck is sometimes hidden by the downstream bottlenecks at San Pablo Dam Road and SR-4. These downstream bottlenecks sometimes back up through the I-80/I-580 split. »» The most congested times are 7:30-9:30 a.m. in the morning (WB), and 4:00-6:00 p.m. in the evening (EB).
Truck Traffic and HOV Volumes HOV Volumes (Vehicles)*
»» On average, the truck percentage on I-80 in this project area is about 4.8%.
Time
I-80 EB University Ave1
I-80 WB
Central Ave2
University Ave1
Central Ave2
AM HOV Hours (5-10 AM)
»» The highest high-occupancy vehicle (HOV) volumes on I-80 are close to 1,600 and 1,500 vehicles/hour during the AM and PM peak periods, respectively
5-6 AM
92
74
1,560
1,574
6-7 AM
196
136
1,567
1,562
7-8 AM
274
191
1,431
1,258
8-9 AM
290
217
1,413
1,206
9-10 AM
351
275
1,153
910
1,203
893
7,124
6,510
Total
PM HOV Hours (3-7 PM) 3-4 PM
1,401
1,291
849
481
4-5 PM
1,464
1,368
758
409
5-6 PM
1,450
1,231
705
406
6-7 PM
1,415
1,238
622
404
Total
5,730
5,128
2,934
1,700
* Tuesdays-Thursdays only, September 15 - November 5, 2015 1 = PeMS VDS 407863; 2 = PeMS VDS 400329; 3 = PeMS VDS 407882; 4 = PeMS VDS 400628.
I-80 Accident Data Accident Data
Traffic Accident Surveillance and Analysis System (TASAS) data were obtained from Caltrans, covering three-year periods (January 2011 to December 2013) for I-80 Mainline, I-80 WB on-ramp from Gilman Street, I-80 WB off-Ramp to Gilman Street, I-80 EB on-ramp from Gilman Street, and I-80 EB off-ramp to Gilman Street.
INTERCHANGE IMPROVEMENT PROJECT
Number of Accidents Location
Fatal
Injury Total1
Mainline (I-80) at Gilman Street
2
48
WB On-Ramp from Gilman Street
0
WB Off-Ramp to Gilman Street
Actual Accident Rate (Accidents/MV)2
Statewide Average Accident Rate (Accidents/MV)2
Fatal
Fatal+Injury
Total
Fatal Fatal+Injury
Total
264
0.014
0.35
1.83
0.004
0.33
1.07
2
2
0.000
0.29
0.29
0.002
0.22
0.63
0
7
31
0.000
0.63
2.79
0.003
0.35
1.01
EB On-Ramp from Gilman Street
0
6
9
0.000
0.61
0.91
0.002
0.22
0.63
EB Off-Ramp to Gilman Street
0
3
4
0.000
0.46
0.61
0.003
0.35
1.01
Source: Caltrans TASAS Notes: 1 Total accidents also include Property Damage Only (PDO) 2 MV = Million Vehicle
5a
PROJECT BUILD ALTERNATIVE
INTERCHANGE IMPROVEMENT PROJECT
5b
PROJECT BUILD ALTERNATIVE
SCALE: 1” = 25’
INTERCHANGE IMPROVEMENT PROJECT
5c
GILMAN PEDESTRIAN OVERCROSSING RENDERINGS
FOR INFORMATION PURPOSES ONLY - NOT TO SCALE
INTERCHANGE IMPROVEMENT PROJECT
6
WHAT IS A ROUNDABOUT? Modern Roundabouts Roundabouts are circular intersections with Specific Design Criteria used to control traffic. Roundabout Applications: »» Most Signalized Intersections »» Closely Spaced or Offset Intersections or Driveways »» Freeway Ramp Termini »» Constrained Roadways (over crossing or under crossing) »» Intersections with High Accident Rates
Design Elements pedestrian refuge
»» You only need to watch for traffic coming from one direction at a time
raised central island
»» Shorter Pedestrian Crossings
pedestrian path landscape buffer
truck apron
»» Slower Traffic »» Pedestrian Refuges splitter island
»» Landscape Separation »» Shared-Use Path
entry deflection
Benefits of the Modern Roundabout REDUCTION IN CONFLICT POINTS
REDUCTION IN COLLISIONS
»» Increased Traffic Capacity / Reduced Delay
100
»» Environmental Benefits
90% reduction
80
75% reduction
• Less Emissions
60
• Less Fuel Consumption
40
37% reduction
ROUNDABOUT
4-WAY INTERSECTION
20
Vehicles - 8 Conflict Points Peds - 8 Conflict Points
Vehicles - 32 Conflict Points Peds - 24 Conflict Points
0
40% reduction
• Noise Reduction »» Landscaping Opportunities
overall injury fatality peds collisions collisions collisions collisions
Source: Federal Highway Administration and Insurance Institute for Highway Safety
INTERCHANGE IMPROVEMENT PROJECT
»» Improved Safety
»» Less Costly to Operate
7
ENVIRONMENTAL REVIEW PROCESS Environmental Process Potential environmental impacts will be analyzed and presented to the public as required by the California Environmental Quality Act (CEQA) and the National Environmental Policy Act (NEPA). »» An Initial Study (IS) / Environmental Assessment (EA) will include the results of focused technical studies. »» The Initial Study (IS) / Environmental Assessment (EA) is scheduled for public review and comment in 2017.
ENVIRONMENTAL REVIEW PROCESS FLOWCHART 1
Prepare Environmental Technical Studies
2
Prepare IS/EA
3
Draft Environmental Document circulated to the public
4
Identify Preferred Alternative
5
Prepare Final Environmental Document, including responses to comments
6
Project Approved
WE ARE HERE
Environmental Resources to be Studied Focused, technical studies are planned to consider project impacts to the following environmental resources: »» Visual/Aesthetic Resources »» Cultural Resources (historic, archaeological, & Native American coordination) »» Water Quality, Hydrology, & Floodplain »» Geology, Soils, Seismic, & Topography »» Paleontology »» Hazardous Materials »» Air Quality »» Noise & Vibration »» Wetlands »» Habitat for Special-Status Species »» Traffic, Bicycle, & Pedestrian »» Community »» Utilities
INTERCHANGE IMPROVEMENT PROJECT
feet meters
1000 300
8
PROJECT DELIVERY Agency Roles and Funding AGENCY ROLES
FUNDING
The Project Sponsors are: »» Alameda County Transportation Commission (Alameda CTC)
»» Project would be funded with local, regional, and federal funds, with the major funding being provided by the Alameda County Transportation Commission via Sales Tax Measure BB.
»» City of Berkeley
In 2014 voters passed Sales tax Measure BB, which implements a 30-year Transportation Expenditure Plan by renewing an existing 0.5 percent transportation sales tax approved in 2000, and increasing that tax by 0.5 percent, for a full 1.0 percent.
The Implementing Agency is: »» Alameda CTC The Implementing Agency is responsible for managing the scope, cost and schedule of the current Project Approval and Environmental Document (PA&ED) phase of this project.
»» Transportation Expenditure Plan commits $24 million for the I-80/ Gilman Street Interchange Improvement Project, with additional funding from the Federal Highway Administration (FHWA) and the City of Berkeley.
The Lead Agency is: »» Caltrans The Lead Agency implements environmental review under the California Environmental Quality Act (CEQA) and the National Environmental Policy Act (NEPA).
Current project cost estimate: $24 million for construction.
Project Schedule Project Milestones 1
2014
2015
Complete Conceptual Design Fall 2014 Complete Conceptual Design
2
2016
2017
2019
2020
2021
Environmental Review Winter 2017 Complete Environmental Review / Implement Preferred Alternative
Final Design / Right-of-Way 2018 Final Design Document
4
Construction 2020 Construction Starts
5
2022
We are here
Summer 2017 Draft Environmental Document
3
2018
Opening Day 2022 Opening Day
INTERCHANGE IMPROVEMENT PROJECT