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0 pointskion1y ago0 comments

I looked into this last year, a significant part of the cost is in new hardware, both on the vehicles, but also sensors spread through the system. They all need commercial grade RF systems that allow for 2 way signaling communication and integration into the vehicles control systems.

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bobthepanda1y ago

also they need to be rated for the operating environment. you can't stick any random part from newegg in there.

Tesla used non-automotive grade touchscreens in some cars and so they died early: https://www.thedrive.com/tech/27989/teslas-screen-saga-shows...

Automotive grade has very high requirements:

> Grade 0: High Temperature Operating Life (HTOL): +175C for 408 hours. High Temperature Storage Life (HTSL): +175C for 1,000 hours. Temperature Cycling: -65C tp +175C for 500 cycles

And generally speaking transit agencies aspire to buy higher-reliability, longer-lasting equipment than your average consumer car.

krallja1y ago

I’ve noticed that my car’s touchscreen operates at a very high temperature at all times - almost hot enough to burn skin, which seems like a weird choice for something designed to be touched by skin.

bobthepanda1y ago

That probably means that whatever is running behind the touchscreen is the thing that’s hot, and the touchscreen is doing a poor job insulating that heat. But is also illustrative of why the automotive standards are the way they are.

markus_zhang1y ago

Thanks! That's good to hear.

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bobthepanda1y ago

also they need to be rated for the operating environment. you can't stick any random part from newegg in there.

Tesla used non-automotive grade touchscreens in some cars and so they died early: https://www.thedrive.com/tech/27989/teslas-screen-saga-shows...

Automotive grade has very high requirements:

> Grade 0: High Temperature Operating Life (HTOL): +175C for 408 hours. High Temperature Storage Life (HTSL): +175C for 1,000 hours. Temperature Cycling: -65C tp +175C for 500 cycles

And generally speaking transit agencies aspire to buy higher-reliability, longer-lasting equipment than your average consumer car.

krallja1y ago

bobthepanda1y ago

markus_zhang1y ago

Thanks! That's good to hear.

j / k navigate · click thread line to collapse