These are the eight ways transit creates economic value, each with a federally-defined methodology. Add them up over 20 years and compare to costs.
CATEGORY 1
Travel Time Savings
When a transit rider switches from driving, they save the productive value of reduced auto travel time. Transit in-vehicle time is valued at 60% of auto time (riders can read, work, or rest). VOT is split by trip purpose: personal trips = $17.80/hr, employer business trips = $31.90/hr (25% of LG ridership estimated as work trips via ACS).
USDOT BCA Guidance 2024, Table 4 • OMB Circular A-94
CATEGORY 2
Vehicle Operating Cost Savings
Every auto trip replaced by transit avoids the marginal cost of operating a private vehicle: fuel, oil, tires, and maintenance. At $0.68/mile (AAA 2024 CA average) and 7.5-mile average trip, each diverted ride saves ~$5.10 in vehicle costs. Across tens of thousands of annual boardings this accumulates rapidly.
AAA "Your Driving Costs" 2024 • FTA CBA Guidelines
CATEGORY 3
Crash Reduction
Fewer miles driven means fewer crashes. Using Santa Clara County crash rates (~120 crashes/100M VMT, SWITRS 5-year average) and FHWA KABCO severity weights, each avoided VMT reduces expected crash costs. Fatal crashes are valued at $12.8M (USDOT VSL 2024). Even rare reductions in serious injury rates produce large economic benefits.
FHWA crash cost tables (2022 update) • SWITRS Santa Clara County
CATEGORY 4
Emission Reduction
Avoided auto VMT reduces CO₂, NOx, and PM2.5 emissions. CO₂ is valued at $120/metric ton per EPA 2022 regulatory guidance (3% rate), corrected from the prior $56/ton IWG value. This ~114% increase in the SCC substantially raises this benefit category. Criteria pollutant health damage valued via EPA BenMAP-CE.
EPA SC-CO₂ Comprehensive Update 2022 • EPA MOVES3.1 • BenMAP-CE
CATEGORY 5
Health Benefits (Active Transport)
Transit riders walk an average of 12 minutes per trip to and from stops (WHO HEAT default). This physical activity reduces mortality risk and healthcare costs at $0.16 per walking minute (CDC valuation of avoided sedentary-related costs). For a system with ~264K annual boardings this represents ~790K walking-hours per year of health benefit.
WHO HEAT v5.2 • CDC Physical Activity Economics 2023
CATEGORY 6
Reliability Benefits
Transit schedules are more predictable than driving on SR-17 and SR-85, where congestion variability can add 10-25% to travel time. Travelers value reliability at 80% of mean travel time savings (USDOT guidance). Observed schedule data shows average deviation of +2.2 minutes at LGHS stops, confirming real variability in this corridor.
USDOT BCA Guidance 2024, Section 5.3 • PeMS SR-17 observed data
CATEGORY 7
Option Value
Even non-riders benefit from transit availability. When a car breaks down, gas prices spike, or someone loses driving ability, transit provides a backup. This option value is estimated at $20-$40 per capita per year (mid-range of stated-preference studies). With ~68,000 residents in the service area, this is a significant base benefit that does not depend on ridership levels.
TCRP Report 78, Section 4.5 • Boardman et al. Ch. 6
CATEGORY 8, NEW
Induced Demand (Accessibility)
Not all transit riders would otherwise drive. An estimated 20% of riders are induced, they make trips that simply would not occur without transit: seniors without licenses, teens, zero-car households, and people making trips that aren't worth the parking cost. Their economic benefit is valued at 50% of the equivalent auto trip cost (consumer surplus triangle). This category is absent from analyses that assume all ridership is auto diversion.
TCRP Report 95, Ch. 1 • Boardman et al. Ch. 5 (demand curve CS triangle)