School bus detector


with school in session, i've wanted build detector warn me kids school bus starting through our neighborhood.  give heads leave house , head bus stop.  useful on cold , rainy days!

my idea mount small box/fake bird house on side of road.  detect bus during time window (to conserve battery). using gsm shield, send text alert.


i struggling sensor use.  not busy street.  thinking of way @ height of vehicle passing.  maybe?

other ideas be:
acoustic frequency sensor sound of bus
motion activated camera color detection (look bus color)

i realize ask bus driver throw tracker in glovebox, or have 9yr old stick tracker under seat.  i'm not thrilled options b/c school property, etc.

so think?  in advance advice!

if don't lot of big trucks through neighborhood, laser trip line @ right height catch bus , miss cars , trucks.  need able mount stuff on both sides of road.  @ least reflector on 1 side. 

you tunnel under street , put load sensor detect weight of bus passing over.


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