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Lead is currently a bit too long; for an article of this length, the lead should be one moderately sized paragraph or two small paragraphs.
Route 19 is sometimes called the Paterson Peripheral. - Doesn't really fit in well with the surrounding text.
Route 19 begins at the intersection of County Route 509 (Broad Street) and County Route 609 (Colfax Avenue) in Clifton, and heads north along with County Route 509 as a four-lane divided highway with a 35 mph (56 km/h) speed limit. - Could be a bit confusing to those unfamiliar with highway terminology; is there a way you could fit in a link to concurrency (road)?
The route passes some businesses before interchanging with U.S. Route 46. - First part of this sentence is trivial at best, indiscriminate at worst.
Are you sure reference #3 lists the correct publisher?
A couple more non-map sources would be good, if possible.