cati-singapore-dataset

CATI Singapore Expressway Traffic Dataset

Real-time vehicle detection data collected from Singapore's 90 LTA traffic cameras using CATI (Context-Aware Traffic Intelligence) — a novel FiLM-conditioned YOLOv11 detector that adapts to environmental conditions in real time.

Dataset Description

This dataset contains per-camera vehicle detection results collected continuously from Singapore's Land Transport Authority (LTA) expressway camera network. Each record captures a full detection sweep of a single camera including vehicle counts, class breakdown, directional split, and environmental context.

Coverage

Data Schema

Versioning note: Filter by conf_threshold, iou_threshold, and imgsz to isolate consistent collection windows. Exclude is_ramp=True rows for mainline-only throughput analysis.

Model

Detections are produced by CATI — a novel architecture that injects FiLM (Feature-wise Linear Modulation) layers into YOLOv11s, conditioning the backbone on real-time environmental metadata:

• Weather condition and temperature (data.gov.sg)
• Time of day (cyclical encoding)
• Camera GPS position (sinusoidal positional encoding)
• PM2.5 air quality
• Camera resolution class

Model weights: SuhxsReddy/cati-singapore

How to Load

from datasets import load_dataset
import pandas as pd

ds = load_dataset("SuhxsReddy/cati-singapore-dataset")
df = ds["train"].to_pandas()

# Vehicles by road
print(df.groupby("road")["total_vehicles"].mean())

# Directional flow on CTE
cte = df[df["road"] == "CTE"]
print(cte[["timestamp", "camera_id", "dir_a", "dir_b", "total_vehicles"]])

Collection

• Sweep interval: ~90 seconds (full network scan)
• Detection threshold: confidence ≥ 0.08, IoU ≤ 0.25
• Image source: LTA Datamall Traffic Images API
• Infrastructure: HuggingFace Spaces (CPU), continuous 24/7 collection

License

MIT — data sourced from Singapore's open data APIs under the Singapore Open Data Licence.

Citation

@dataset{cati_singapore_2026,
  author    = {SuhxsReddy},
  title     = {CATI Singapore Expressway Traffic Dataset},
  year      = {2026},
  publisher = {HuggingFace},
  url       = {https://huggingface.co/datasets/SuhxsReddy/cati-singapore-dataset}
}