Landscape Architect & Specifier News

AUG 2017

LASN is a photographically oriented, professional journal featuring topics of concern and state-of-the-art projects designed or influenced by registered Landscape Architects.

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underused right-of-way to pedestrians, and how to bolster the corridor's character. By enlarging sidewalks from 9-feet to 19-feet, the design team vastly increased pedestrian space within the corridor while also including new plazas, pocket parks and alley retrofits. A 400% increase in tree canopy brought much needed shade to the corridor, as well as various ecological services discussed later. These strategies increased foot traffic on P Street, benefitted retail stores, increased pedestrian safety and increased the number of "eyes on the street" to deter littering and crime. Overall, there has been a 67% increase in public appreciation of P Street among those polled. Enhance Corridor Roadways for Motorized Transit During the public outreach it was determined that no increase in pedestrian benefits could be a detriment to vehicular traffic. This presented a particularly interesting challenge for the design team. Instead of simply recommending a "road diet," the team had to be much more strategic with space. Through a decrease in lane width from 15-feet to 11-feet, and the removal of turning lanes, space opened up for more on street parking. This has had a direct economic impact on city retail sales and fee collections. Strategic actions such as managing delivery hours and changing the loading patterns of city buses meant the team was able to maintain an "A" vehicular level of service. Enhance Environmental Integrity of the Corridor Urban ecosystems directly affect the health and wellness of the communities they support. The P Street master plan employed various performance strategies to assure trees could thrive in place, and that the street would be more resilient to storms, pollution and other stressors. By using Silva Cells, the streetscape provides an average of 600-800 cubic feet of space per tree for root growth. The amount of permeable surface was also increased by 30% to increase stormwater infiltration. This strategy, coupled August 2017 37

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