City of Hercules — Collision Safety Dashboard

KSI Total

2015–2025 excl. 2020

Fatalities

People killed

Visible Injuries

City streets

171

Total Collisions

City streets only

11.7%

KSI Rate

20 / 171

9.1%

Alcohol KSI Rate

vs 12.1% non-alcohol

Annual collision trend by severity

2015–2025 excl. 2020 — gap marks excluded year

Severity breakdown

All city street collisions

Collision type distribution

Count by type

Primary collision factor

Top contributing factors

Collisions by hour of day

Red=late night · Yellow=PM peak

Day of week

Volume by weekday

What vehicle hit

Motor vehicle involved with

High Injury Network Explorer

Sorted by KSI · All years 2015–2025 excl. 2020 · City streets only

Era Comparison

2015–2019 (pre-COVID) vs 2021–2025 (post-COVID) Equal 5-year windows · 2020 excluded · All metrics normalized

KSI rate per year — trend

Blue=2015–19 · Orange=2021–25

Volume per year

Crash count trend by era

Collision type — KSI rate shift

Blue=era A · Orange=era B · Higher = more deadly per crash

Primary factor — volume/year

Is the mix of causes changing?

HIN Corridor Changes: 2015–19 vs 2021–25

The Safety Story: 2015–2019 vs 2021–2025

Equal 5-year periods · 2020 excluded · Stats normalized for fair comparison

📉

KSI Rate: Genuine Improvement

-6.9%

KSI rate fell from 12.09% to 11.25% — a real improvement. This positive trend must be protected through continued targeted safety investment.

🚗💨

Speed: #1 Cause of Crashes & KSI

11.8% → 16.7%

Unsafe Speed is the #1 PCF in Hercules with 47 crashes. Speed KSI rate: 11.8% (era A) → 16.7% (era B). Physical calming, feedback signs, and road diet evaluation are the priority responses.

🛣️

REFUGIO VALLEY RD: Persistent Hotspot

3 → 2 KSI

REFUGIO VALLEY RD is the #1 HIN corridor with 5 total KSI (0 fatal). Remains city's highest-risk corridor.

🔀

HIN: Concentrated Risk

4 new corridors

4 new corridors emerged in 2021–25 not present in 2015–19. 1 corridor persist across both eras. Concentrated risk — targeted corridor investment is efficient.

🍺

Alcohol: Persistent Risk

0.0% → 22.2%

Alcohol KSI rate rose from 0.0% to 22.2%. At 22.2%, alcohol crashes remain 0.8× more deadly than non-alcohol. DUI enforcement must intensify.

🚶

Pedestrian KSI Rate Elevated

25.0% → 15.4%

Pedestrian KSI rate: 15.4% era B. 21.2% of ped crashes in dark conditions — LED lighting and RRFB crossings are the priority response.

🌙

Dark KSI Improving

21.4% → 19.0%

Dark-condition KSI rate improved: 21.4% → 19.0%. 49 dark crashes, 10 KSI. Lighting improvements are working — maintain investment.

📊

Volume vs Severity

18/yr → 16/yr

Crash volume: 18/yr (era A) → 16/yr (era B). Both volume and severity trends require sustained investment.

🔄

Top Intersection: SAN PABLO AV & SYCAMORE AV

1 KSI

SAN PABLO AV & SYCAMORE AV — 1 KSI (0 fatal), 4 crashes. Era A: 1 KSI → Era B: 0 KSI. Targeted intersection capital recommended.

AI-Powered Safety Insights

Multivariate patterns · Hercules city streets 2015–2025 (excl. 2020) · Ranked by policy impact

⚠️

Alcohol Multiplier Effect

0.8×

Alcohol KSI rate: 9.1% vs 12.1% non-alcohol. 12.9% of crashes, 10.0% of KSI.

DUI Enforcement

🌙

Darkness Amplifies Severity

21.2%

Of pedestrian crashes occur in dark. After-dark ped crashes are 4.4× more likely to be fatal/severe than daytime (57.1% vs 13.0% KSI rate).

Street Lighting

🚗💨

Speed KSI Rate Surging

16.7%

Speed KSI rate: 11.8% → 16.7% era A→B. 47 speed crashes = #1 PCF. Each speed crash dramatically more deadly post-pandemic.

Speed Calming

🕐

Late Night KSI Spike

25.0%

KSI rate 0–5 AM is 4.4× higher than midday (5.7%). 0.0% of crashes, concentrated fatal risk window.

High-Severity Window

⚡

Alcohol + Dark: Compound Risk

14.3%

Alcohol AND dark: KSI rate hits 14.3% — well above city average of 11.7%. Disproportionate harm from this combination.

Compound Risk

📅

Weekend Night Danger Window

20.0%

Fri/Sat/Sun after 9 PM: 20.0% KSI rate. 15 crashes, 3 KSI. Targeted enforcement these 3 nights addresses disproportionate fatal risk.

Enforcement Timing

Collision type × severity heatmap

Darker = higher KSI rate

KSI rate by time of day

When is each crash most likely to be fatal or severe?

Annual KSI vs total collisions

Volume declining but severity rising — the key trend

Top 5 corridors — KSI persistence

Dangerous year after year

Year

Severity

Type

—

Showing

—

KSI

—

Fatal

—

KSI Rate

Severity

Fatal

Severe

Visible

Pain

SS4A FY2026 Implementation Grant — Project Portfolio

Three plans based on 2021–2025 post-COVID crash data · May 26, 2026 deadline

HSIP Cycle 13 — Project Recommendations

Cross-cycle C8–C12 analysis · Hercules award history · 2021–2025 crash data

$5M–$18M est. portfolio

HSIP Grant Intelligence Module

Synthesized from Cross-Cycle Analysis C8–C12 · Countermeasure Trends · C12 Report & Funded Projects List

$0.35M

Hercules HSIP Won

C12

Projects Funded

Prior award cycles

$1.15B

Program Total

1,281 projects C8–C12

$5–18M

C13 Portfolio Target

6 recommendations

Hercules HSIP Application History

Cycle	Project ID	Category	HSIP Award	Description
C12	H12-04-161	BCR	$346K	LPI+APS+countdown: Refugio Valley Rd

C13 Statewide Intelligence

🚀 Rising Countermeasures (C8→C12)

Gaining frequency & funding — prioritize for C13

LPI: 0→33 projects · +33

RRFB/Beacons: 11→57 · +46

Retroreflective Backplates: 1→23 · +22

Class IV Bike Lanes: 14→31 · +17

Raised Medians: 8→19 · +11

📉 Declining Countermeasures

Losing funding share — supplement but don't lead with these

Signal Timing Only: 45→12 · -33

Striping/Delineation Only: 28→9 · -19

Guardrail: 22→8 · -14

Rumble Strips Only: 11→4 · -7

BCR Sweet Spot

$1.5M–$4M

Hercules should target $1.5–3.5M per BCR application. Stack 3+ countermeasures for highest BCR score.

Best Win Strategy

3-CM Stack

C12 winners averaged 3+ countermeasures per application. Prior C12 wins provide competitive positioning.

VRU Pool

44 VRU

33 ped + 11 bike = 10 KSI. Qualifies for VRU Special Rule set-aside.