A device being tested in Hong Kong projects a red light onto the ground to remind pedestrians to stop while the “Don’t Walk” signal is engaged.
from NBC News Top Stories https://ift.tt/rHY48wt
https://ift.tt/Gp8TZM1
A device being tested in Hong Kong projects a red light onto the ground to remind pedestrians to stop while the “Don’t Walk” signal is engaged.
from NBC News Top Stories https://ift.tt/rHY48wt
https://ift.tt/Gp8TZM1
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