How do I design a circuit in Track Architect?

Tap the track to add a corner, drag a dot to move it, and tap a dot then Remove corner to delete it. The start/finish line is placed automatically on your longest straight. One design unit is 1.5 metres, so a loop that fills the canvas is a full-length Grand Prix circuit.

What am I racing against on my own circuit?

A par lap computed for your layout — the time a clean drive at the limit of grip sets from a standing start, with corner speeds derived from each corner's radius. Once you have set a lap you can race your own best, and members can race each other's recorded laps as ghost cars.

How do I challenge another member?

Sign in, set a lap, then tap Challenge with my lap. The link carries both your circuit and your recorded lap, so whoever opens it races your actual line, with the gap shown live. Every new best on the circuit becomes the next challenge.

What are the controls?

Arrow keys or WASD to steer, accelerate and brake, and R to get back on track. It is a standing start: you and the ghost leave the grid together and the clock starts on your first throttle. On mobile, play fullscreen for the analog steering strip with automatic throttle and a brake button.

Do I need an account?

No. Designing, racing the par lap, racing your own best from this session and sharing a circuit all work without one. An account saves your laps to the circuit's leaderboard and lets you send challenge links.

Pitbrain Play · Create & Race in 3D

Track Architect Build a Circuit, Race It in 3D

Draw a circuit corner by corner, then race it in full 3D. Beat the par lap, chase your own ghost, and send members a link to race your actual line.

How to play

Shape a circuit, then race it in 3D — the engine builds the road, the kerbs, the elevation and the corner speeds from your drawing.

Tap the track to add a corner; drag a dot to shape it. The grid goes on your longest straight.
Hit Race it in 3D. It is a standing start against the par — a clean lap at the limit of grip on your layout.
After a lap, race your own best as a ghost, or pick a member from the circuit's board.
Share sends the circuit; Challenge with my lap sends your circuit AND your ghost.

On mobile, play fullscreenfor the analog steering strip and automatic throttle. Laps save to the circuit's leaderboard when you are signed in.

Scoring

Draw a circuit, then race it in 3D. Your lap time is the score, judged against a par lap computed for your layout — the time a clean drive at the limit of grip sets. Members' best laps are saved per circuit and can be raced as ghosts.

Tips for a better score

Corner speeds come from radius: a 30 m hairpin is a 90 km/h corner whatever you do, so the time is made on entry and exit, not mid-corner.
Long straight into a tight corner is where you gain on a ghost — brake a car-length later each lap until it stops working.
Racing your own best shows exactly where a lap went wrong; racing par shows how much is left.

The Formula 1 behind Track Architect

Real circuit design is the same trade: corner radius sets the minimum speed, and the sequence of corners decides where a car can follow closely enough to attack. Tilke-era circuits deliberately pair a slow corner with a long straight and a heavy braking zone for that reason.

8 corners

Tap the track to add a corner · drag a dot to shape it · tap a dot to select · the grid goes on your longest straight

Your circuit19/100 · processional

2.48 km625 m straight135 m tightest2 braking zones

Hard to pass on: the slow corners do not have a long enough run into them.

Fancy a head-to-head?

Challenge another member to a live 1v1 — same challenge, side by side, live.

Challenge a member to a Track Architect Duel

Tips for a better score

Corner speeds come from radius: a 30 m hairpin is a 90 km/h corner whatever you do, so the time is made on entry and exit, not mid-corner.

Long straight into a tight corner is where you gain on a ghost — brake a car-length later each lap until it stops working.

Racing your own best shows exactly where a lap went wrong; racing par shows how much is left.