interchange improvement project - Berkeley - Berkeleyside

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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