If you live near the Fullerton DMV, please let me know if there is a lot of traffic there at around 7 am.?

Answer 1

Euclid street, which is next to DMV is a major N/S through-way and is usually very busy during rush hours.

Typical Orange County traffic.

If you're planning to GO to the DMV, the BEST time is 30 minutes before closing time. They can't go home 'till everyone is taken care of, so they really start getting things done quickly. NO ONE is on break, out to lunch, or just leisurely walking around carrying paperwork to look busy. 

Answer 2

You can see traffic patterns and density on the Google Maps app. It's real-time, so check it tomorrow morning.