Brent P wrote:

> In article >, Scott en Aztlán
> wrote:
>> "Once drivers on cell phones hit the brakes, it takes them longer to
>> get back into the normal flow of traffic," Strayer said. "The net
>> result is they are impeding the overall flow of traffic."
>
> This reminds of a particularly rude LLB, whom when I got his attention

When in doubt, use "who". At least you can say it was a colloquialism.

> just thought his behavior of blocking up the entire road because of his
> phone call was perfectly acceptable.