Relative

What it shows

Cars near you on track and the gap in seconds.

http://127.0.0.1:8745/w/relative?lang=en

Maximum subscription: 20 + 1 Hz.

URL options

neighbors=2|3|4|5 (4): cars on each side. columns=position,number,flag,driver,state,license,irating,gap,tire selects and orders columns; all except tire by default. clock=0 hides the local clock.

Common options.

Calculations and limits

Orders by proximity on track, not race position. Gaps use interpolated crossings of 200 mini-sectors; negative means ahead. Without recent history, the estimate is abs(offset) × class reference lap time. PIT means pit road; OUT is an observed out lap; L3 is three completed laps at pit entry. Tire compound is an index, not an inferred label. TC, ABS and brake bias always belong to the player. Hidden without rows; hideEmpty=0 keeps the waiting view.

Track position

offset = wrap(car_pct − player_pct, 1)

pct is the fraction of a lap. wrap maps the difference into (−0.5, 0.5]. A positive offset means ahead; a negative one means behind.

Rows are sorted by offset, from the furthest ahead to the furthest behind. Up to N cars on either side of the player are shown.

Time gaps: mini-sectors

We divide the lap into 200 mini-sectors. For each car, we store the SessionTime at entry to each sector. When it crosses several between samples, intermediate entry times are interpolated.

• Car ahead: gap = now − time that car passed my current position.
• Car behind: gap = now − time I passed that car's current position.
• Within a mini-sector, we interpolate between its entry and the next sector’s entry.

A car ahead has a negative signed gap, unlike the sign of offset.

Missing information

At the start of a session, after a tow, or when the data is older than ¾ of a lap, the fallback is:

gap_magnitude = |offset| × reference_lap_time_for_player_class

This is an estimate. It does not replace a recent measured passage at the same point.

Lap differences, races only

distance = completed_laps + pct
laps = (car_distance − player_distance) − offset

The result is rounded and clamped to −1, 0 or +1. It describes the lap relationship, not the full count when cars are multiple laps apart.

Safety car

The pace car is shown only when it is on track and outside pit road.

How standings are calculated.

Privacy

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Privacy guide.