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Albert Street Corridor Performance

AT PROJECT SCATS + TOMTOM 5 INTERSECTIONS

Corridor signal optimisation across 5 Albert Street intersections — SCATS SM phase timing, SCATS VS volumes, and TomTom probe travel time · Auckland CBD

DEMO
Peak DoS Level
Critical ≥ 0.90
High 0.80–0.89
Acceptable < 0.80
Intersection
Time Period
AM Peak
PM Peak
Off-Peak
View
Intersection Schema Animated signal & vehicles
Phase Timing Before / after green time
Degree of Saturation Per-phase DoS comparison
Corridor Travel Time TomTom probe time profile
DoS Scale
Critical ≥ 0.90
High 0.80–0.89
Acceptable < 0.80
After Optimisation
Intersection Schema — Albert St / Customs St W
Animated signal phasing with vehicle movements · AM Peak
DEMO
Speed
SCATS 2234
Albert St / Customs St W
-36.8443, 174.7653 · 100s cycle
Signal Phases
Hourly DoS Profile
Critical Phase DoS — 24h
Space-Time Diagram — Green Wave Coordination
Signal progression along corridor · NB direction · AM Peak
Volume & DoS Profile — All Intersections
Approach volumes and peak DoS across corridor · AM Peak
Phase Performance Summary
Before and after signal optimisation — all intersections, all periods
Intersection Phase Movement Green Before Green After Δ Green DoS Before DoS After Delay Before Delay After Status

Methodology & Data Sources

This analysis combines three data streams to evaluate and optimise signal performance across the Albert Street corridor.

SCATS SM Signal Master Data

SCATS Signal Master logs provide cycle-by-cycle phase timing records — green time, cycle length, offset, and degree of saturation (DoS) — for each SCATS site. Data extracted at 15-minute intervals for AM Peak (07:00–09:00), PM Peak (16:00–18:00), and Off-Peak (10:00–15:00) periods.

SCATS VS Volume & Saturation

SCATS Vehicle Sensor data provides per-approach vehicle counts and occupancy measurements. Used to compute arrival flow rates, peak hour factors (PHF), and effective lane utilisation. Combined with SM data to calculate degree of saturation per phase and approach.

TomTom Probe Travel Time

TomTom probe vehicle data provides corridor-level travel time measurements for the Albert Street study corridor (Customs St W to Mayoral Dr, ~720m). Speed profiles at 5-minute resolution are used to calculate end-to-end journey time, identify congestion onset, and validate signal coordination offset effectiveness.

Other Tools & Dashboards

Signal Performance
Isolated intersections · ATOC
Bottleneck Analyser
CBD congestion ranking
Speed Heatmap
Violation hotspot analysis
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