== Discontinuity == 

 Unless  time moves randomly, I highly suggest that a historical mistake be addressed here. In the history of WA 599, it says it became US 99 in 1968, changed to US 99T sometime around 1963 or so and then became SR 99T in 1964. It also says the freeway was constructed in 1968. There is a very strange and impossible four year difference here. I really think someone needs to address this.