This is from my very first night shooting
and about
the 5th or 6th picture I took that night.
And almost in the Pacific NW: Kalispell, May 1996,
with my then new SLR, a Nikon N70 with AF Nikkor 35-80 / 4 - 5.6 D and Kodak CG 100-4.
An interesting effect comes by the street lamp running with 60Hz, giving a light similar to a multi flash freezing some of the motion blur.
A similar effect seems to be visible in your first picture, light going on and off, maybe from some LED-lights, which often run at a frequency of ?? 24Hz?? (you have that with most of the red LED backlights of cars here in Europe).