Lincoln Spray Patching: More Repairs With Smaller Crews

The field problem

Repeated freeze–thaw cycles produced potholes that demanded quick response, often in live traffic. Traditional hot- and cold-mix patches called for crews of four and could require longer street closures. A failed patch meant a return trip. For a manager overseeing streets, fleet and facilities, the question was how to use the same workforce more effectively across the full maintenance program.

The 2016 rollout

Lincoln began using four Rosco RA-400 spray patchers in May 2016. In a May 1, 2017 Government Fleet interview, Barger said the city no longer needed the same manpower surges for pothole repair after the winter freeze–thaw cycle. He described patches that were staying in place and crews freed to perform a higher volume of permanent repairs. The article reports that operators were ready after roughly a week of training and practice.

The machine lets one operator work from inside the cab. A boom blows debris from the hole, applies an emulsion tack coat, fills it with coated aggregate and finishes with dry aggregate. The City’s pothole-maintenance page describes the process and says spray patching is its primary repair method in dry conditions when street temperatures are at least 40°F. That continuing use is later City practice; it should not be mistaken for a measured 2016–17 savings figure.

What changed, and what remains unmeasured

Moving from a four-person conventional crew to a single operator per patching truck changed the labor and traffic-control requirements of each deployment. Working from the cab reduced employees’ time on foot beside traffic. The trade publication reported shorter disruptions and fewer repeat repairs based on the city’s early experience and Barger’s account. It did not provide a controlled comparison of total annual cost or independent measurement of patch life, so this case study makes no percentage savings claim.

The City also uses cold material when pavement temperatures or surge demand make spray patching unsuitable. Spray injection therefore fits within a broader maintenance system rather than replacing every other repair technique.