Hmm … yes. Adding blur and glow, but only to the streaks might be good. That could be done by duping the streaked layer, blurring it, then setting its mode to “add” or “screen”. This way the cars would not be blurred as well.
Now if the camera is locked off, and you have some time, you could draw some masks where you want the streaks and use the stroke effect to get sharp streaks. Maybe dupe and offset them a bit to get extra copies to save time. Just a thought …