Document all ongoing/tentative collaborations

book/src/SUMMARY.md

@@ -41,3 +41,4 @@
     - [Year 3](project/history/year3.md)
   - [Full CHANGELOG](project/CHANGELOG.md)
   - [References](project/references.md)
+  - [Collaborations](project/collaborations.md)

book/src/project/collaborations.md

@@ -0,0 +1,63 @@
+# Collaborations
+
+We're working with a few different groups on projects using A/B Street.
+
+## GLT
+
+Active as of Sept 2020
+
+[Green Lights Trading](https://www.greenlightstrading.com) is applying dynamic
+congestion caps to encourage drivers to find alternate routes, not drive during
+rush hour, or take public transit instead. I'm actively implementing a
+proof-of-concept in A/B Street. It could also be used to explore ideas like a
+downtown congestion charging zone for Seattle.
+
+## Xi'an
+
+Active as of Sept 2020
+
+A group (with their own demand data!) is studying traffic signal optimization in
+Xi'an. They're using the
+[API](https://dabreegster.github.io/abstreet/dev/api.html).
+
+## Forecasting group
+
+Active as of Sept 2020
+
+A research group is making a bunch of live map edits and scheduling new trips in
+the middle of a simulation and using their system to try to predict system-wide
+effects. They're also using the API.
+
+## CityEngine
+
+Stalled as of Sept 2020
+
+Edits in A/B Street could be exported to the
+[shared-row](https://github.com/d-wasserman/shared-row/) format, then rendered
+in 3D using
+[ArcGIS CityEngine](https://github.com/d-wasserman/Complete_Street_Rule). Not
+blocked on us.
+
+## Berlin
+
+Stalled as of Sept 2020
+
+A group wants to use A/B Street for various public engagement projects in
+[Berlin](https://github.com/dabreegster/abstreet/issues/119). Mostly blocked on
+getting a reasonable travel demand model.
+
+## Manchester
+
+Stalled as of Sept 2020
+
+A group tentatively wants to engage the public about preventing rat runs and
+making no-through-access zones in Manchester suburbs. Not really blocked on us
+yet.
+
+## Pandemic model
+
+Stalled as of Sept 2020
+
+A group from the Uni of Geneva started a
+[COVID-19 model](https://github.com/dabreegster/abstreet/tree/master/sim/src/pandemic)
+that figures out how long people spend in shared indoor spaces.

book/src/trafficsim/live_edits.md

@@ -40,3 +40,9 @@ should just be rescheduling the `StartBus` commands.
 What happens if you modify a parking lane while there are cars on it? For now,
 just delete them. Trips later making use of them will just act as if the car
 never had room to be spawned at all and be aborted or fallback to walking.
+
+A better resolution would be to relocate them to other parking spots. If the
+owner is home, it'd be neat to have them walk outside, move the car, and go back
+in. But this greatly complicates the simulation -- the edited lane is in a
+transition state for a while, it modifies schedules, the person might not be
+around, etc.