I decided not to renew my Professional Traffic Operations Engineer certification from the TPCB. About 15 years ago I wrestled with the decision to get the certification and decided it wouldn't hurt.
Certifications signal a level of diligence and knowledge to folks who may hire you. My resume, and this blog, are lengthy enough to prove I am a competent traffic engineer, so I don't need to signal my expertise with a certification.
The TPCB has put me into an inactive stage on my certification, which easily allows me to change my mind. That's thoughtful of them. I'd just have to submit my CEUs (which I have ample) and pay the lapsed fees. I'll let you know if I change my mind, which would correspond to me going back to actively doing traffic engineering work.