Busy Road - 1 mile TMobile dead zone

I have a very specific question re: coverage in Oregon City, OR 97045. 
 

Redland Road is a busy road that is highly travelled. For at least the past year any call I am on while driving on Redland Road drops about a half mile before the cross street of Ferguson Road and there are no cell service bars for approximately the next mile on Redland Road. 
 

Can this be addressed? Please?