The Vauxhall Tonic (every burp is nervous)

• LTN boundary selection can now split neighborhoods in most ways
• allow UK scenarios to be generated with one-shot imports
• fix pedestrian rendering crash that happened in some maps
• fix how cycle-and-foot-only roads are drawn unzoomed
• make LTN impact prediction tool stop running out of video memory
• internal refactoring to separate Scenario stuff from rest of simulation code

Liquidy Thicket and a Series of Unhygienic Events

• sped up initial loading of the LTN tool on web by splitting it from the main A/B Street binary
• LTN UX: preserve dropdown settings and saved routes
• draw LTN cells as proper polygons, always clipped to the neighborhood boundary (instead of a grid)
• support LTN GeoJSON export in web
• prototyped an impact prediction for LTN schemes by comparing per-road volumes using a demand model. Not working yet.

Loose bricks sink hips

• experimenting with a few heuristics for automatically placing modal filters
• improved rendering in the "browse neighborhoods" screen: show all filters, emphasize boundary roads, optionally show cell connectivity, and optionally show how "good" the neighborhood is
• draw disconnected cells more loudly
• fix bug introduced recently that broke listing files (especially newly imported maps)
• add an "undo" button for the LTN tool
• export all LTN data to GeoJSON -- the cell polygons are slow to produce, and buggy, though
• start ranking neighborhoods by how many streets with through-traffic exist
• make the "adjust boundary" UI mostly work now -- individual blocks are transferred between neighborhoods properly in most cases

The interconnectedness of some things

• bugfixes for partitioning space into blocks, which helps the LTN tool

An unintentionally badass scar

• improved LTN rat-run detection
• LTN UI overhaul, expressing 3 modes for per-neighborhood analysis, all of which can edit modal filters
• LTN drawing fixes -- including the 4-color theorem to make sure adjacent areas appear distinct
• LTN tool now understands roads that're already tagged as car-free in OSM
• LTN tool can adjust boundaries a bit more precisely, but this still half-broken
• Marcel overhauled walking turns, letting them be bidirectional and switching to a simpler implementation of crosswalk generation
• Marcel improved the geometry of all turns
• fix downloading maps in the Windows version

Fogbike

• draw custom boundaries for LTNs (but can't yet save the boundaries)
• rendering modal filters better when zoomed in
• v3 of a rat-run detector, and showing a heatmap of quiet/busy streets

sconus sultannical

• bus routes now imported for Seattle and SF, from GTFS
• fix "bowtie" intersection shapes, resulting from incorrect clockwise ordering
• few small OSM data fixes for London and Leeds
• fix crash when customizing a route in Ungap the Map

Outwalking the rat run

• render one-way markings as outlines by Marcel
• few fixes, mostly just importing some new places
• the project lead has moved to London ;)

brownie bear

• no right turn at red lights, in most of the world. thanks Marcel!
• simplify map importing config
• some fixes to OSM crosswalk matching
• placing LTN modal filters more intuitively
• change level of traffic assumptions in LTN pathfinder. thanks Andrew!
• diagonal modal filters for LTNs

mostportem

See https://a-b-street.github.io/docs/project/history/retrospective/index.html for a look back on the project so far. I started https://github.com/sponsors/dabreegster to fundraise for a full-time Rust developer.

• added basic routing to LTN tool
• roads with modal filters belong to two traffic cells
• progress on LTN rat run detection, but still not ready
• new option to use OSM crossing nodes to model unmarked foot crossings