Centerline Studio
Feature Walkthrough
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Centerline Studio — Feature Walkthrough

Corridor decisions that used to take weeks now take minutes.

A full lifecycle benefit-cost analysis engine combined with live cross-section design — purpose-built for the earliest, highest-leverage stage of corridor planning.

<60s
Blank canvas to full BCA
6+
Analysis modules
40
Year lifecycle horizon
5
Benefit categories
Cross-section workspace

Design the section. Measure the case.

Drag-and-drop geometry control for every corridor element. ROW constraints enforced live. Every adjustment — lane width, bike facility type, parking removal — immediately updates your BCR, NPV, and payback year.

Cross-section workspace
SW
Bike
Lane
Lane
Park
Bike
SW
1.8 m 1.5 m 3.5 m 3.5 m 2.4 m 1.5 m 1.8 m
Protected
bike lane
added
Parking
removed
for ROW
2.14
BCR
$4.2M
Net NPV
Yr 11
Payback
Lifecycle BCA engine

From geometry to economics in real time.

Full net present value, benefit-cost ratio, and discounted payback year across a configurable 5–40 year horizon. Outputs update with every design change — no recalculation step, no waiting.

2.14
Benefit–Cost Ratio (BCR)
$4.2M
Net NPV (PV30)
Year 11
Discounted payback
$1.96M
Total PV benefits
7.0%
Discount rate
Cumulative NPV by year — 30-year horizon
Scenario: Protected retrofit — 2-lane arterial — 1.8 km corridor
Five benefit categories

Every benefit stream, quantified.

Five independently calculated benefit streams — safety, cycling mode-shift, active-travel health, travel time, and emissions — all derived from your cross-section geometry and aggregated into a single BCR.

🛡
Safety
Crashes avoided valued against HCM unit costs — PDO, injury, and fatal events
$620K
🚲
Cycling
Journey quality and induced demand via NACTO/PBIC elasticity multipliers
$480K
❤️
Health
Value per induced active-travel trip using WHO/HEAT methodology
$390K
Travel time
Person-hours saved across all corridor users and modes annually
$310K
🌿
Environment
Reduced VMT and tailpipe emissions at social cost of carbon
$160K
Extended analysis

Six modules for deeper decisions.

Beyond the core BCA, six extended modules answer the questions that come up in every corridor study — sensitivity, equity, emissions, demand, federal funding eligibility, and side-by-side alternatives comparison.

01
Alternatives Comparison
Snapshot any two scenarios and compare geometry, costs, and all BCA outputs side-by-side.
02
Tornado Sensitivity
Ranked chart of how ±25% swings in key drivers — cost, rate, safety — move your BCR.
03
Carbon Accounting
Lifecycle carbon balance — mode-shift CO₂ reduction vs. construction embodied carbon.
04
Induced Demand
NACTO/PBIC elasticity multipliers project new daily cycling trips from the treatment.
05
Equity Analysis
0–100 equity score derived from active-transport investment share and area context.
06
Federal Grant Match
Scores your project against RAISE, SS4A, CRP, CMAQ, ATIIP, and TAP eligibility.
MERIDIAN assistant

Your methodology expert, built in.

Ask MERIDIAN anything about BCR, NPV, discount rates, NACTO guidance, or your specific results. Get plain-language answers that are ready to use in briefings and reports — not jargon that needs translation.

MERIDIAN — methodology assistant
You
Why is my BCR dropping when I widen the cycle lane?
M
M
Widening from a painted to a protected lane increases capital cost — but the cycling benefit only scales with the elasticity multiplier, which has an upper bound. If the ROW comes from a travel lane, you also lose travel-time benefit. Try running Alternatives Comparison to see both scenarios quantified side by side.
You
What discount rate should I use?
M
For public infrastructure in Canada, Treasury Board recommends 7–8% real. US OMB uses 7% as default. Run the Tornado sensitivity to show how BCR shifts across the plausible range — standard practice for screening-level work.
Scenario templates

Five corridor typologies, ready to run.

One-click presets pre-loaded with geometry and cost assumptions. Start a full BCA in seconds, then customise every parameter to your corridor.

🚴
Protected retrofit
Physical separation on existing arterial. Parking removal with safety uplift.
🏪
Main street
Mixed-use corridor balancing pedestrian, cycling, and parking.
🚌
Transit priority
Dedicated bus lanes with active transport improvements.
🚋
Streetcar corridor
Fixed guideway integration with cycling facility configuration.
🏙
Compact retrofit
Constrained ROW with trade-offs between all modes.
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Corridor decisions, made earlier.

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Welcome
Centerline Studio brings lifecycle benefit-cost analysis to the earliest stage of corridor planning — where decisions actually matter. This walkthrough covers every major feature in under two minutes.
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