The Math Behind Smarter Streets

Every dollar spent at the right time saves five later. Here is the data that makes the financial case undeniable.

Pavement Life Cycle

PCI Decay Curve

Pavement Condition Index drops from 100 to 20 over 25 years. Intervening early costs a fraction of reconstruction.

100 80 60 40 20 0

PCI 70 — Seal Coat Window

PCI 50 — Overlay Window

PCI 25 — Reconstruct

$2/SY

Seal Coat

$15/SY

Overlay

$80/SY

Full Reconstruct

0

5

10

15

20

25

Pavement Age (Years)

GOOD (PCI 70-100)

FAIR (PCI 40-69)

POOR / FAILED (PCI <40)

Cost Per Square Yard

Treatment Cost Ladder

The difference between the cheapest and most expensive fix is 80-320x. Early treatment is the highest-ROI investment a city can make.

Crack Sealing

PCI 70-90 • +3-5 yr life

$0.25-$1

Chip Seal

PCI 65-85 • +5-7 yr life

$1-$4

Slurry Seal

PCI 65-80 • +4-7 yr life

$2-$2.50

Thin Overlay (2")

PCI 50-70 • +8-12 yr life

$7-$20/SY

$7-$20

Mill & Overlay

PCI 40-60 • +10-15 yr life

$15-$20/SY

$15-$20

Full Reconstruction

PCI <25 • Full reset

$40-$80+/SY

$40-$80+

$0 COST PER SQ YARD → $80+

The Exponential Penalty

Why Delay Destroys Budgets

Pavement deterioration is not linear. The same 40% PCI loss that takes 75% of the pavement's life to occur the first time happens again in just the final 12%.

First 75% of pavement life

40%

PCI loss

75% of lifespan

Slow, predictable deterioration. Preventive treatments extend this phase for pennies on the dollar.

Acceleration

Last 12% of pavement life

40%

PCI loss

12% of lifespan

Rapid, cascading failure. Once past the tipping point, costs explode 6-40x.

Strategy Comparison

Worst-First vs. Optimized Approach

Same city, 200 lane-miles, $3M/year budget. Two strategies, dramatically different results.

Worst-First

Lane-Miles Treated 5

Treatment Type Reconstruction only

Network PCI Trend -2 pts/yr

Budget Reach 2.5% of network

Network Coverage Per Year

Remaining Untreated: 97.5%

5-Year PCI Projection

YR 1 YR 5

Optimized

Lane-Miles Preserved 40

Lane-Miles Overlaid 8

Network PCI Trend Holds / +1 pt/yr

Budget Reach 24% of network

Network Coverage Per Year

Preserved: 40 mi • Overlaid: 8 mi

5-Year PCI Projection

YR 1 YR 5

10x

More lane-miles treated

24%

Network reached per year

+3

PCI points gained in 5 years

Annual Optimization Value

$500K+

In recovered annual value from a $5M/year budget

That is 10% of total spend redirected from emergency reconstruction to high-ROI preservation — every single year.