Sure. I am sure different people have different takes on it, but the agitate part sort of goes with the educate part. Like if you say to someone "Hey, isn't X pretty fucked up?" and they respond "I don't know, maybe, why?" and then you explain patriarchy/neocolonialism/history of the Vietnam War/obscure state laws victimizing minorities/etc., and then suddenly they are like "Yeah, that IS really fucked up, someone should do something about it." and you respond "No, WE should do something about it." That is basically the three steps of the slogan, and is greater than JUST complaining or JUST advertising an organization. And of course, once you hit that last step, the educating and organizing continues (people like to forget how much of the 1960s was reading social-political-theoretical discussion).

Freeway protests are really just a contemporary reaction to several things that did not face the 1960s or other times of revolt (and hence why people like to do the "MLK didnt do X"). Ever greater suburabnization and defunding of public transport in the US means most people travel alone on highways away from the public, except as traffic. Thus there are few "public spaces" to protest in and actually address the public without being run over (this was part of the message of Occupy Wall Street and the privately-owned Zucotti Park: people had their "right" of assembly, but no place to actually effectively assemble that was legal). Actual soap boxes and yelling worked in the 20s and crowds on campuses and city centers worked in the 60s, but in the desperation of no public spaces and the piling of bodies, freeway stops have become the only thing more eye-catching than a tweet. Also, if someone is not going to support out of traffic-spite, their support was probably not gonna be that vital anyways, one way or the other.

You say "your election", so you must not be American, but let me just say, the literal geography of our politics is a very important thing, and is much different than in European cities where a "city square" and old city layouts mean public spaces are actually still present. And more generally, rural/urban, North/South, coastal/inland, and racially-segregated cities means the "where" of American politics is key, and thus the only common intersection today, freeways, is very important.