# Google Directions traversal-time archive — UIUC campus OD pairs (Apr 23 – Apr 29 2026)

60-second polling of the Google Directions API on 8 fixed origin-destination
pairs across the UIUC campus, intended for transit-corridor traversal-time
analysis under varying pedestrian and traffic load.

Window: **2026-04-23 ~22:00 UTC → 2026-04-29 23:42 UTC** (~5 days live data).

## OD pairs (each polled bidirectionally)

| pair label | A | B |
|---|---|---|
| `union-engquad` | Illini Union | Engineering Quad (Grainger area) |
| `arc-mainquad` | Activities & Recreation Center (ARC) | Main Quad |
| `ikenberry-everitt` | Ikenberry Commons | Everitt Lab |
| `isr-union` | Illinois Street Residence Halls (ISR) | Illini Union |

8 queries per cycle (4 pairs × 2 directions), 60 second cadence ⇒ ~11.5K
calls/day, ~70K calls total.

## Layout

```
{YYYY-MM-DD}/{HH}.jsonl   # one JSON record per query
```

Each line:

```
{"ts": "...", "od_pair": "union-engquad", "direction": "AB",
 "duration_s": 542, "distance_m": 1180, "summary": "Wright St",
 "raw_response_bytes": 4321, "dry_run": false, "err": null}
```

## Provenance & license

- Source: Google Directions API responses, polled via authorized API key on
  a Google Cloud project owned by the archiver.
- Archived by Darsh Poddar, UIUC undergrad, for academic research on UIUC
  bus-delay prediction. Code: https://github.com/drPod/data-dive
- License: CC-BY 4.0 for the archived metrics. Note: this dataset contains
  derived metrics (durations, distances) only — no raw Google response
  bodies and no Google IP — so it should not raise Google Maps Platform
  Terms of Service concerns. If you republish, please acknowledge the
  Google Directions API as the upstream source.

## Citation

```
Darsh Poddar (2026). Google Directions traversal-time archive — UIUC
campus OD pairs. Hugging Face. dr-pod/data-dive-google-directions.
```

## MTD attribution

This dataset uses data from the Champaign-Urbana Mass Transit District (CUMTD / MTD).
Per the [MTD API Terms of Use](https://developer.mtd.org/terms), any use of MTD data
must include the following identification:

> Data provided by the Champaign-Urbana Mass Transit District (CUMTD).
> For more information, visit [mtd.dev](https://mtd.dev).