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> the signals are programmed in a 40 year old language that only a very small group of highly paid traffic engineers know how to write. This is interesting. Wh
by unflxw 3y ago
> the signals are programmed in a 40 year old language that only a very small group of highly paid traffic engineers know how to write.
This is interesting. What language is this, or more generally, where can I read more about this?
- mschild 3y agoedit: Whops. Just realized theyre talking about the US. Disregard my comment. I'm not entirely sure what OP is talking about, but I think they use a system called SCATS.[0] Looks like the system is actually pretty widely used in some other countries as well. [0] https://www.scats.nsw.gov.au/solutions/products https://www.scats.nsw.gov.au/solutions/products
- yamazakiwi 3y agoTraffic light systems are designed using software such as LINSIG, TRANSYT, CORSIM/TRANSYT-7F or VISSIM. Per wikipedia different countries use different systems over time: e.g. Sydney: 3,400 traffic signals co-ordinated by the Sydney Co-ordinated Adaptive Traffic System (SCATS). Designed and developed by RTA, the system was first introduced in 1963 and progressively developed since then. By October 2010, SCATS was licensed to 33,200 intersections in 144 cities across 24 countries worldwide, including Singapore, Hong Kong, Dublin, Tehran and Minneapolis and Detroit.[19][23][24] https://en.wikipedia.org/wiki/Traffic_light_control_and_coordination https://en.wikipedia.org/wiki/Traffic_light_control_and_coor...
- nwahs_op 3y agoIf you are super bored. Here is a manual that is VERY detailed explanation on programming traffic signals. I give this to new engineers and technicians to look at when they first start. Chapters 5 and 6 get into the actual programming of the signal. https://ops.fhwa.dot.gov/publications/fhwahop08024/index.htm https://ops.fhwa.dot.gov/publications/fhwahop08024/index.htm