# What makes a great skatepark

The design brief behind PARK CHECK (`js/parkcheck.js`). World units are metres;
bookquoy scale maps 1:1 (a 1.8 radius quarter = a 6ft quarter).

## Flow & line architecture
- **Collision-free traffic paths** — no intersecting lines; nothing drops in across
  another feature's run.
- **Adequate flatland & run-outs** — 10–15ft (3–4.5m) of clear flat for setup and landing
  recovery. Tight squeezes kill speed and create bottleneck bail zones.
- **Pumping geometry** — transition radii that feel natural: 6–8ft (1.8–2.4m) for
  street-flow sections, 9–11ft+ (2.7–3.4m) for deep bowls.

## Obstacle variety & progression
- **Skill tiering** — 8–10in (0.2–0.25m) micro-ledges and mellow banks alongside the
  14–18in (0.35–0.45m) standard ledges, handrails and hubbas, so beginners progress
  without occupying main lines.
- **Terrain balance** — street (stairs, manual pads, flatbars, euro-gaps) paired with
  transition (spines, hips, speed bumps, open bowls).
- **Coping mechanics** — consistent reveal (~3/8in proud above and in front of the lip)
  for predictable grinds; pool coping and tile in advanced bowls. *(Game mapping: rails
  hug the deck height — PARK CHECK flags buried or floating steel.)*

## Surface & build quality
- Smooth high-PSI steel-trowelled concrete; prefab metal/wood deteriorates and seams at
  the transition base. *(Game mapping: one continuous heightfield — no seams by
  construction.)*
- Expansion joints routed away from landings and slide paths.

## Drainage & sightlines
- Drains and micro-slopes strictly outside trick lines; no puddle pockets.
- Open sightlines across the footprint to spot traffic and clear landings.

## Amenities & community
- Lighting for evenings, shaded perimeter seating clear of run-ups, water, bins, transit
  access. *(Game mapping: props/set dressing live outside the bounds slab.)*