ICPI Issue 2 2019

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replaced more easily for repair of utilities than concrete or asphalt.” Residents expressed concern about the pavers in public meetings held to allow residents to comment on proposed designs, says Lozier. “They were worried that pavers would not provide a smooth surface that was comfortable and safe for pedestrians and bicyclists,” he explains. “We were able to point out other areas in the city where pavers are used, and everyone agreed that there were no problems.” The original design proposed a fairly intricate paving pattern. “We talked to contractors during the development of the plan to ensure that the design was achievable during installation,” says Mr. Lozier. “The layout uses a herringbone

pattern with selected pavers laid out with different colors to suggest a circular design.” In addition to changing specifications for aggregate used in the project to address difficulty obtaining material, there was also a need to develop an engineering detail at the intersection corner, says Mr. Martin. “Some of the intersection corners are flush with the sidewalks to allow delivery trucks to drive onto them, so the paving profile had to be adjusted to transition from a pedestrian-only profile to a vehicular traffic profile at these corners,” he explains. This required additional 6 inches of ASTM No. 2 stone to the base and a reduction of the ASTM No. 57 stone, he adds.

“We have never used interlocking pavers on a city street before this project, only on private parking lots, but we were comfortable with the subgrade engineering,” says Mr. Abbanat. “The area is not heavily traveled but there are some heavy trucks delivering to local businesses, so the pavement needed to handle that weight.” Feedback on the project has been positive, and interlocking pavers could be considered for future projects if appropriate, says Mr. Abbanat. “Pavers are an important factor when creating a pedestrian-friendly feel for an area that also includes vehicle and bicycle traffic.”

COVER STORY

Issue 2 • 2019 ® esign interloc 11

PICP along the sidewalks and next to the trees provides needed air and water for them.