See the article from today's UT: http://www.sandiegouniontribune.com/news/politics/sd-me-bike-hotspots-20180621-story.html
Also the more detailed report is here: https://www.ebcyclinglaw.com/san-diego-bicycle-crashes-study/
Big ones for us: 101 in Encinitas, Washington & Broadway and Valley Pkwy & Midway in Escondido, in Oceanside, Coast Hwy and Mission or Eaton. Check them out. Ride safely.