Nitroit

Overview

Nitroit is a fictional large industrial city in the United States, on a river, built around a port, the iron mines in the hills north of it, and the mills and plants that grew between the two. It is dense, layered, and old enough to have neighbourhoods that do not like each other. The ore still moves and the port still works, but most of the plants closed a generation ago and left their neighbourhoods behind. A car here is transport, employment and identity at once, and the street scene grew out of all three.

The city is owned by a small number of families and worked by everybody else, and both groups race. See Street scene.

Nitroit is the open world: seven districts, seamless, drivable end to end, day and night, with live traffic and live police.

The shape of the city

Every district's road character follows from when that part of the city was laid out and what for.

Layer	Period	What it produced
1. The Old Quarter — before the grid	1810s–1850s	The original settlement on the river bend. Irregular blocks, streets following old cart tracks and the shoreline, inconsistent widths, stone kerbs, unmapped alleys. Downtown grew on top of it rather than replacing it: a knot of narrow nineteenth-century streets with twentieth-century towers standing in it.
2. The grid — the industrial explosion	1860s–1920s	Most of Nitroit. A strict orthogonal grid numbered off two baselines: River Street, along the water, and Foundry Avenue, running due north from it into the hills. East–west numbering counts from Foundry; north numbering counts from River. Addresses tell you where you are, which the game uses for navigation and for how NPCs give directions.
3. Rail and industry	1870s onward	Freight rail runs from the port, through the mills, north to the mines. The corridors cut the grid into wedges and give the districts hard edges: a rail cut with three bridges over it is a border. Industrial land was zoned in large blocks near water and rail — the Docks and the Industrial Flats: enormous parcels, long straights, few intersections, almost no residents.
4. Residential flight from industry	1900s–1950s	Riverside and the northern neighbourhoods, built by people who could afford to move upwind of the mills. Wide boulevards, planted medians, deep setbacks; still a grid, but a gentler one.
5. The expressway	1960s	An elevated ring driven through the city where land was cheapest — through neighbourhoods rather than around them. The Expressway Ring is a scar as much as a road, and older NPCs from the districts it cut through say so.
6. The Heights	1970s onward	Built last, privately, on terrain the grid could not climb. Curvilinear estate roads, cul-de-sacs, gated access, no through traffic.

Terrain

The grid fails where the land rises. North of the city the ground climbs into wooded hills, and the streets stop being a grid and become switchbacks. That single fact produces Ridgeline.

Feature	Where	Effect on driving
The river	South and west edge	Crossed by five bridges. Every crossing is a bottleneck, and every pursuit route eventually involves one.
The hills	North	Elevation, switchbacks, blind crests, no barriers.
The flats	Centre and east	Dead flat, laid out square, built for trucks.
The rail cuts	Throughout	Hard district borders with limited crossings.
The quarry lakes	North-east, beyond the mines	Flooded workings. Paved access roads, guardrails, water on both sides.

Green space

Nitroit is overwhelmingly asphalt, but not uniformly. Four places are green, all paved, all drivable, none of them a race venue:

Place	What it is
Riverbend Park	Riverfront parkland along the south edge, with a paved parkway and no traffic lights along its length.
The Ridge Forest	Wooded state land wrapping the northern hills. The mountain roads run through it; the trees are why the crests are blind.
Quarry Lakes	Flooded mine workings with a paved loop around them. Nobody lives there and almost nobody goes.
Old Quarter Commons	The city's original square, still cobbled, ringed by the oldest streets in Nitroit.

These places are for driving through, not racing on. Night meets happen at their edges. The Ridge Forest road is a competition route because it is a mountain road, not because it is in a forest. The parkway and the quarry loop host nothing: they are the two best drives in Nitroit, and the game never puts a marker on either.

There is no off-road racing in the game — no rally, dirt, gravel or unpaved events, in either half. Every competition surface is sealed.

Scale

Population	About 800,000 in the city, about 2 million in the region
Drivable area	Roughly 40 km² of streets, plus the expressway ring and the hill roads
Longest continuous straight	The Docks container road, 1.9 km
Highest to lowest point	310 m, Ridgeline crest to the waterline
Bridges	5
Rail crossings	14, of which 9 are grade-separated