Lincoln Walnut Proposed Diverter Island
City of Alameda
City Council
March 17, 2026
City of Alameda
Vision Zero Policy and Action Plan
Data Driven Approach
Lincoln Walnut Intersection 2020
Vision Zero Actions
Preliminary Data Review
Lincoln Walnut Intersection 2025
Proposed Diverter Island
Agenda
Vision Zero – Data Driven Approach
2009-2018 Data
Lincoln Walnut Intersection - 2020
Road Diet from 4 Lanes to 3
Lane Merge West of Intersection
Left Turn Pockets on Walnut
Red Curb to Improve Visibility
Painted Bulbouts
High Visibility Crosswalks
Vision Zero Actions - Corridors
$120 Million Investment in Traffic Safety
Vision Zero Actions - Intersections
Safety Improvements at 48 of top 75 Intersections
Corridor Projects
Annual Paving Projects
Slow Streets
Targeted Safety Projects
APD Collision Data from January 2009 through October 2024 Total since 2009
Notes
CENTRAL AV / BROADWAY
41 High Vis crosswalk in 2024 with better bike markings
LINCOLN AV / WALNUT ST
38 Eastbound lane reduction in 2020
non-signalized
PARK ST / BLANDING AV
38 No discernable changes
WEBSTER ST / LINCOLN AV
34 Commercial Slow Streets 2020
CENTRAL AV / PARK ST
32 Commercial Slow Streets / lane reduction in 2020
WEBSTER ST / BUENA VISTA AV
32 No discernable changes
LINCOLN AV / PARK ST
30 No discernable change, new pavement in 2020
CENTRAL AV / OAK ST
29 High Vis crosswalk in 2024 with better bike markings
ATLANTIC AV / CONSTITUTION WY
28 Cross Alameda Trail in 2020
SANTA CLARA AV / SHERMAN ST
27 New Stop sign in 2019
non-signalized
FERNSIDE BL / HIGH ST
27 no discernable changes
LINCOLN AV / WILLOW ST
26 High Vis crosswalk in 2020
MAIN ST / WILLIE STARGELL AV
25 Lane reduction in 2019, new seaplane ferry
OTIS DR / WESTLINE DR
24 Shoreline and Otis lane reductions 2015, 2020
LINCOLN AV / GRAND ST
24 No discernable changes
CLEMENT AV / OAK ST
24 No discernable changes
non-signalized
PARK ST / CLEMENT AV
23 Cross Alameda Trail, high vis crosswalks 2024
OTIS DR / BROADWAY
23 No discernable changes
WEBSTER ST / CENTRAL AV
22 Commercial Slow Streets / lane reduction in 2020
PARK ST / SANTA CLARA AV
22 Commercial Slow Streets / lane reduction in 2020
SAN JOSE AV / PARK ST
22 Commercial Slow Streets / lane reduction in 2021
GRAND ST / OTIS DR
22 Otis Lane reduction, protected intersection in 2021
LINCOLN AV / BROADWAY
21 Repaved / restriped in 2020
LINCOLN AV / OAK ST
21 No discernable changes
8TH ST / TAYLOR AV
20 "Keep Clear" markings in 2018, RRFB in 2020
non-signalized
SANTA CLARA AV / WILLOW ST
19 New Stop sign in 2020
non-signalized
PARK ST / BUENA VISTA AV
19 No discernable change, new pavement in 2020
ENCINAL AV / HIGH ST
19 High vis crosswalks in 2019
LINCOLN AV / SHERMAN ST
19 No discernable changes
BUENA VISTA AV / GRAND ST
19 No discernable changes
BUENA VISTA AV / CONSTITUTION WY
18 No discernable change
MAIN ST / W MIDWAY AV
18 Lane reduction in 2019, new seaplane ferry
OAK ST / SANTA CLARA AV
18 Bike lanes / Lane width reduction in 2019 and 2023
WEBSTER ST / WILLIE STARGELL AV
18 No discernable changes
CENTRAL AV / WILLOW ST
17 High Vis crosswalk in 2024 with better bike markings non-signalized
TILDEN WY / BROADWAY
17 Broadway repaved/restriped in 2020
BUENA VISTA AV / SHERMAN ST
16 Free right turn eliminated in 2022
PACIFIC AV / OAK ST
16 Slow Street
non-signalized
PACIFIC AV / SHERMAN ST
16 Slow Street
non-signalized
CENTRAL AV / 8TH ST
16 no discernable change
CONSTITUTION WY / MARINA VILLAGE PK
16 no discernable change
RALPH APPEZZATO MEMORIAL PK / MAIN ST
16 Site A complete in 2021
CENTRAL AV / HIGH ST
16 High vis crosswalk in 2020, better bike markings in 2024
BUENA VISTA AV / OAK ST
16 No discernable changes
BUENA VISTA AV / UNION ST
15 No discernable changes
non-signalized
CENTRAL AV / CHESTNUT ST
14 Minor changes, recent 2024 paint post bulb outs
non-signalized
SAN JOSE AV / PEARL ST
14 No discernable change
non-signalized
CENTRAL AV / GRAND ST
14 Repaved / restriped in 2024
BUENA VISTA AV / WILLOW ST
14 No discernable changes
non-signalized
ENCINAL AV / PARK ST
14 Commercial Slow Streets 2020, Encinal Lane reduction 2023
SANTA CLARA AV / EVERETT ST
13 High Vis crosswalk in 2020
non-signalized
8TH ST / HAIGHT AV
13 "Keep Clear" markings in 2018
non-signalized
Vision Zero – Preliminary Data
APD Collision Data – 2009 through Oct 2024
Separated Data 2009 - 2019 and 2020 - Oct 2024
Overall 9% Reduction in Collision Rate
Corridors with Road Diets
Main Street 26% Reduction
Otis 32% Reduction
Park Street 33% Reduction
Webster Street 40% Reduction
Intersection Collisions
Where Improvements Made 39% Reduction
Vision Zero – Top 20 Intersections
APD Collision Data from Jan 2009 through Oct 2024 Total since 2009
Rate / year
Total since 2020
Rate / year
Percent Reduction
Collisions Avoided 2020-2024
Notes
CENTRAL AV / BROADWAY
41 3.00
8 1.66
45%
7 High Vis crosswalk in 2024 with better bike markings
LINCOLN AV / WALNUT ST
38 2.45
11 2.28
7%
1 Eastbound lane reduction in 2020
PARK ST / BLANDING AV
38 2.00
16 3.31
-66%
-7
No discernable changes
WEBSTER ST / LINCOLN AV
34 2.27
9 1.86
18%
2 Commercial Slow Streets 2020
CENTRAL AV / PARK ST
32 2.36
6 1.24
47%
6 Commercial Slow Streets / lane reduction in 2020
WEBSTER ST / BUENA VISTA AV
32 1.82
12 2.48
-37%
-3
No discernable changes
LINCOLN AV / PARK ST
30 2.36
4 0.83
65%
8 No discernable change, new pavement in 2020
CENTRAL AV / OAK ST
29 2.09
6 1.24
41%
4 High Vis crosswalk in 2024 with better bike markings
ATLANTIC AV / CONSTITUTION WY
28 2.18
4 0.83
62%
7 Cross Alameda Trail in 2020
SANTA CLARA AV / SHERMAN ST
27 2.00
5 1.04
48%
5 New Stop sign in 2019
FERNSIDE BL / HIGH ST
27 1.82
7 1.45
20%
2 no discernable changes
LINCOLN AV / WILLOW ST
26 2.00
4 0.83
59%
6 High Vis crosswalk in 2020
MAIN ST / WILLIE STARGELL AV
25 2.09
2 0.41
80%
8 Lane reduction in 2019, new seaplane ferry
OTIS DR / WESTLINE DR
24 2.18
0 0.00
100%
11 Shoreline and Otis lane reductions 2015, 2020
LINCOLN AV / GRAND ST
24 1.27
10 2.07
-63%
-4
No discernable changes
CLEMENT AV / OAK ST
24 0.91
14 2.90
-219%
-10
Cross Alameda Trail in 2025
PARK ST / CLEMENT AV
23 1.27
9 1.86
-46%
-3
Cross Alameda Trail, high vis crosswalks 2025
OTIS DR / BROADWAY
23 0.91
13 2.69
-196%
-9
No discernable changes
WEBSTER ST / CENTRAL AV
22 1.73
3 0.62
64%
6 Commercial Slow Streets / lane reduction in 2020
PARK ST / SANTA CLARA AV
22 1.64
4 0.83
49%
4 Commercial Slow Streets / lane reduction in 2020
40 Collisions Avoided
Lincoln Walnut Intersection – 2025
Pedestrian Fatality in 2021
Flashing Beacons Installed
Shifted Lane Merge West
Higher Visibility Bulbouts
Lincoln / Walnut Collisions 7% Reduction
Broadsides represent 30 of 38 Collisions
Lincoln / Walnut Options
Does not meet warrants for Stop Sign
Would be only stop on corridor, low compliance
Does not meet warrants for Traffic Signal
Expensive ~$800,000
One-Way Couplet with either Willow or Oak
Larger impact on area, Doesn’t address broadsides
Prohibit Through/Left movement
Diverter Island, Limit exposure to broadsides
Proposed Diverter Island
Proposed Diverter Island
32 Southbound Movements
56 Northbound Movements
AM Peak
AM Peak
Proposed Diverter Island
Reduce Exposure to Broadside Collisions
Allow Pedestrians and Bicycles to use Walnut St
Maintain Left Turns from Lincoln to Walnut
Acceptable to Fire Dept
Quick and Relatively Inexpensive < $30k
Proposed Diverter Island
Alters Vehicular Access and Operations
Baseline Traffic Counts Collected at Willow and Oak
General Plan Mobility Element, Goal 2 Safety
Eliminate fatalities and severe injuries on Alameda’s streets, avenues, sidewalks, crosswalks, paths and trails by 2035 General Plan Mobility Element Policy MU-13, Alameda Street Grid Manage and extend the Alameda street grid to maintain the character of Alameda, reduce traffic, and maximize mobility, access, and safety for all modes of transportation
Recommended Action
Authorize the Public Works Director to Install Improvements to the Lincoln Avenue and Walnut Street Intersection, Prohibiting Through and Left-Turn Movements from Walnut Street.
Lincoln Walnut Collision – 8/6/25
Lincoln Walnut Collision – 11/7/25
Proposed Diverter Island