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BDI Hackathon 2026 · SinkAlert
The Cost of
Not Having SinkAlert
Every number below is a real collapse that SinkAlert could have prevented.
฿1.4B+
Real Damage
5+
Lives Lost
54+
Injured
฿7/km
SinkAlert Cost
VERITY TECH · DATA FOR BETTER SAFETY
Real Incidents

Two collapses. One year.
Billions in damage.

Incident #1
สามเสน Sinkhole
฿1B+
Repair Cost
30×30m
Crater Size
50m
Depth
18 mo
Recovery
Sep 24, 2025 · Dusit, Bangkok · 7:13 AM
Vajira Hospital evacuated · Police station demolished · 100+ families displaced
Incident #2
Rama II Beam Collapse
5-6
Deaths
24-30
Injured
฿5M+
Compensation
Lawsuits
Ongoing
Mar 15, 2025 · Chom Thong, Bangkok · Early morning
Workers pouring concrete when beam collapsed · Criminal + civil lawsuits filed
Deep Dive

สามเสน: Anatomy of a ฿1B+ Disaster

📍 Samsen Road, Dusit, Bangkok — Sep 24, 2025
฿1,040M
Repair + Police Station
1,500t
Concrete Lost into Tunnel
10%
Repair Progress After 6 Months
100+
Police Families Evacuated
30m²
Tunnel Wall Breach
Mar 2027
Partial Reopening Target
🏛️ Ripple Effects
  • Vajira Hospital — all outpatient services closed
  • Area declared official disaster zone
  • Royal Navy deployed free express boats
  • Insurance premiums projected to rise
  • MRTA Purple Line (฿19B) construction halted
⚖️ Accountability
  • Police investigating criminal charges
  • MRTA ordered to collect damages from CK + STECON
  • PM Anutin personally visited site
  • Industry-wide construction safety review
  • Public trust in mega-projects damaged
Pattern Recognition

It's Not Just Bangkok

Road collapses across Thailand, 2023–2026 — every single one could have been detected early
DateLocationTypeDeathsCost / Impact
Sep 24, 2025 สามเสน, Dusit Sinkhole 0 ฿1.04B+
Mar 15, 2025 Rama II, Chom Thong Building Collapse 5-6 ฿5M+ comp
Aug 25, 2024 Sam Yaek Fai Chai MRT Sidewalk Sinkhole 0 2m deep hazard
~2024 Tao Poon MRT Sinkhole 0 2×3m crater
Oct 19, 2024 Patong Hill, Phuket Landslide Collapse 0 Tourist route affected
May 23, 2023 Chiang Rai Sinkhole 0 Pipe leak cause
Ongoing Ramkhamhaeng, BKK Chronic Subsidence 0 2cm/year
Chronic Threat

Bangkok Is Sinking — Right Now

This isn't speculation. It's measured, published, peer-reviewed.
155
Mapped Subsidence Points
Across Bangkok
2 cm/yr
Ramkhamhaeng Road
Fastest in City
10 mm/yr
Citywide Average
Subsidence Rate
120 mm/yr
Historical Peak
Early 1980s
"Researchers from Kasembandit University surveyed and found 155 points of road subsidence in Bangkok. On average, the capital and environs were sinking at 10mm a year."
— Kasembandit University Engineering Faculty Survey
Invisible Damage

The Costs Nobody Invoices

Beyond direct repair — what ฿1.4B doesn't capture
🚗
Traffic Chaos
฿11B/year
Bangkok traffic opportunity cost (KResearch). Samsen closure compounded congestion for 6+ months. Navy emergency boats deployed.
🏥
Healthcare Shutdown
฿10–20M
Vajira Hospital: all outpatient, primary care, and specialty clinics suspended. Ambulances diverted. Staff couldn't reach workplace.
🏘️
Community Displaced
฿25–60M
100+ police families evacuated. Nearby residents displaced. Businesses lost customers for months. Some may never recover.
⚖️
Legal Spiral
Unquantified
Criminal lawsuits vs CK + STECON. Civil suits by EXAT. Insurance premiums rising. Public trust in infrastructure eroding.
⏱️
18 Months Lost
Mar 2027
Samsen Road: partial reopening not until March 2027 — 18 months after collapse. Full capacity even longer.
🇹🇭
National Drain
฿500B/year
Thailand's total road accident cost: 3.06% GDP. Infrastructure failure is an unrecognized contributor.
The Solution

SinkAlert Would Have Prevented This

Without SinkAlert
฿1.4B+
Actual damage, 2 years
  • ฿1B+ Samsen repair (still ongoing)
  • ฿40M police station rebuild
  • 5–6 deaths, 54+ injuries
  • 18-month road closure
  • Criminal + civil lawsuits
  • Hospital shutdown, 100+ displaced
  • Insurance spikes, trust destroyed
With SinkAlert
฿7/km
Nationwide monitoring
  • 🛰️ InSAR detects subsidence weeks early
  • 🚗 Dashcam CV spots surface cracks
  • 🌧️ Soil moisture alerts before failure
  • 7–14 day advance warning window
  • Preventive repair: ~฿200K each
  • Zero road closures needed
  • Zero casualties. Zero evacuations.
The Math

Return on Prediction

142,857 : 1
ROI — preventing ONE Samsen-scale collapse
฿1,000,000,000 Repair cost avoided
+ ฿200,000,000 Indirect damage avoided
─────────────────────────────
฿1,200,000,000 Total saved per major collapse

÷

฿7,000 SinkAlert monitoring cost
(1,000 km × ฿7/km × 1 year)

=

฿1,200,000,000 ÷ ฿7,000
= 171,428 : 1 return
The Bottom Line
฿1.4 billion in damage.
5+ dead.
1 preventable problem.
SinkAlert costs ฿7 per kilometer.
The next collapse will cost ฿1,000,000,000.
142,857:1 return on prediction
Verity Tech · BDI Hackathon 2026 · Track: Data for Better Safety
dashboard.cfoth.ai/sinkalert
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