Radio rush hour time slots. Frequent traffic/weather updates, and an ethos
(especially on music radio) that's perkier/poppier than other hours.
"Morning drive" has institutions like Don Imus or Howard Stern, or some
local Morning Zoo's cretin-spawn. "Afternoon drive" brings the RushClones, e.g. WABC's Sean Hannity, with a show so vile and adolescent, it makes Rush Limbaugh sound statesmanlike - the perfect road rage vibe after a near-postal day at the office.