This calculator compares the real monthly cost of driving to work in Colorado Springs against a Mountain Metropolitan Transit pass, so you can see which mode saves money.
How it works
Driving cost is split into out-of-pocket spending and the full economic cost. The round-trip distance drives both:
round_trip_miles = one_way_miles * 2
monthly_miles = round_trip_miles * commute_days
fuel_cost = (monthly_miles / mpg) * gas_price
out_of_pocket = fuel_cost + parking
full_irs_cost = monthly_miles * 0.67 + parking
transit_cost = monthly_pass (Mountain Metro ~$50)
The IRS standard mileage rate (about $0.67/mile) bundles fuel, depreciation,
insurance, and maintenance, so it reflects the true cost of using the car rather
than just what you spend at the pump.
Example
A 12-mile one-way commute, 22 days a month, at 28 MPG and $3.20/gal gas
covers about 528 round-trip miles. Fuel is roughly $60, plus $70 parking,
for $130 out of pocket — versus a $50 transit pass.
Notes
Gas prices and parking vary by neighborhood and season. The transit pass is a flat figure regardless of distance, so longer commutes favor transit more strongly. Add bike or carpool options manually by lowering the inputs.