Drive. Tap. Done.
Defensible before/after corridor studies — on the iPhone or Android phone in your cup-holder. Industry-standard speed bands, FHWA reliability metrics, HCM platoon arrival, dollar-figure economic impact.
No credit card. 30 days. Full feature set. Built by Rhythm Engineering.
Study Workbench
IC-New Corridor · NB
Travel time
3:42
−18s
LOTTR
1.18
Excellent
$ saved/yr
$487k
Welch’s t-test, p < 0.0001 · n = 6 BEFORE / 6 AFTER
Everything you need for an arterial study, on a phone
Field crew records on iPhone or Android. Desk engineer analyzes in the portal. Client gets a PDF.
iPhone or Android, no dedicated hardware
Pulsing mint START button, driver-glance header, auto-direction-reversal, and offline-first sync. The driver never takes eyes off traffic.
- Auto-detects U-turns and starts the paired-direction run
- Quick Collect mode for new corridors with zero pre-config
- Keep-awake during recording — phone won't sleep mid-run
- Auto-sync after every run, plus a tappable badge to retry
Analysis surface engineers actually trust
Time-Space Diagram with median + percentile bands. Speed/Distance plot. Travel-Time Distribution histogram with PTI, BTI, LOTTR.
- Delay Breakdown stacked by moving / stopped-queue delay
- Platoon Arrival per signal (HCM Arrival Type 1–6)
- Confidence panel with Z-based sample-size calculator
- Auto length-validator rejects runs that didn't drive the corridor
Defensible client deliverables
Before/After PDF report with executive summary, Welch's t-test significance, reliability KPIs, economic impact, methodology.
- PDF, Excel (.xlsx) multi-sheet, and four CSV variants
- Watermark-aware trial mode for prospect-side previews
- Engineer / client / prepared-by metadata on the cover
- Dollar figures convert engineering metrics into client-fundable language
The boring stuff that saves the study
Three-phase post-sync pipeline runs on every push: segment analysis → time-period classification → length validation. Each in its own transaction.
- 8-table relational schema with soft deletes
- Bidirectional dirty tracking — nothing silently lost
- JWT auth, role-based access, multi-tenant org separation
- UTDF timing-plan upload with effective_from / effective_to dating
From run to client report in three steps
Drive the corridor
Open the app, tap START. The driver-glance header tracks elapsed time, signals passed, GPS accuracy. Auto-reversal handles the return leg.
Sync to the portal
Park, and the run uploads itself. The desk engineer sees it in real time at pulse.rhythmtraffic.com — no USB sticks, no email.
Export the report
Workbench computes reliability, platoon arrival, economic impact. One click yields a branded PDF, Excel, or CSV the client can defend.
Standards your client recognizes
No black-box scores. Every number on the report traces to a published method.
Industry-standard speed bands
Speed-banded GPS dots and a 13-metric segment table — the visual conventions traffic engineers already trust on signal-timing study reports.
FHWA reliability
PTI = p95/p50, BTI = (p95−p50)/p50, LOTTR = p80/p50. LOTTR ≤ 1.5 maps to the 23 CFR 490 reliable-segment threshold.
HCM Arrival Type
Per-signal AT 1–6 from Rp = (1 − stop rate) ÷ (g/C). Date-aware UTDF plan match — BEFORE and AFTER studies pick the right plan automatically.
Economic impact
USDOT BCA value-of-time, EPA Social Cost of Carbon, CalTrans ICF criteria-pollutant rates, NCHRP cost-per-stop. Editable per organization.
Start free, scale per seat
A 30-day trial with the full feature set. Convert when your first study ships.
30 days
Full feature set. No credit card. Watermarked exports while on trial.
- Unlimited corridors and studies
- All workbench analytics
- PDF / Excel / CSV exports (watermarked)
- 1 user seat
Per seat / year
Multi-seat licenses for consulting firms and agencies. Volume-priced. Annual billing.
- Unwatermarked PDF / Excel / CSV reports
- Org admin, engineer, viewer roles
- Cost Assumptions per organization
- Single sign-on roadmap
- Email support
Trials and licenses are billed through Stripe. License status is enforced server-side; trial reports remain watermarked until conversion.
Your next study deserves a phone, not a desktop.
30-day free trial. Full feature set. Cancel anytime.
Start free trial