Sharraxaadda

On most mornings there are police on 21st street just south of K street. Its not apparent their purpose but there are several issues. first they dont do anything about eastbound traffic on K street that blocks the intersection preventing cars heading south on 21st to proceed thru the intersection. as long as the Police are there they ought to ticket some of these impatient drivers who cant bear to wait to cross 21st. Second, there have been a few mornings where the Police cars occupy 1-2 on lanes on 21st street just south of K; this is inexcusable during rush hour as three lanes of 21st street traffic try and converge into a single or 2 lanes. Whats the story here?