Math: Hush on the Tracks

$12m


Estimated amount Sound 
Transit will spend to reduce noise along its train route

303


Homes in Rainier Valley 
set to be retrofit to block 
train racket

80


Decibels generated by 
trains along Duwamish River 
Bridge before any 
sound proofing began




10


Decibels sound proofing 
is estimated to cut

10


Decibels produced by 
rustling leaves




7


Types of noise Sound Transit 
has identified, including 
rail grinding and safety bells

3


Times the word “ka-thunk”
appears in reports released 
by Sound Transit