When you block traffic on a major thoroughfare you need to expect someone to try to run through the blockage. If you are stupid enough to stay in front of said vehicle you deserve whatever happens to you. There was an incident in San Luis Obispo where a leftist group was blocking southbound US 101 near the base of Cuesta grade. Had there been a runaway truck coming off that grade, dozens of those protestors would have been killed. Runaway trucks coming off the hill usually are not able to slow down enough to stop until half way through San Luis Obispo.
Bookmarks