Safe Streets

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APA Annual Conference, Minneapolis, Mn April, 2009
CSS Manual Fire and Emergency Response Section
Peter Swift, PE
newurbanengineering.com
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-The CSS Manual has strengthened the section on
emergency response issues -The new narrative
does not prescribe tactical or operational
strategies -The context is particularly
important, so the section suggests a series of
questions to ask the local fire
official. -This will help the designer
understand local operational concerns and
stratagies and lead toward a constructive
dialog. -There is a parallel effort the CNU has
begun a process to revise the International
Fire Code to deal with Context Sensitive Streets.
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Traffic related issues Fire Related
Issues
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Narrower streets are safer streets, but Fire
operations must be accommodated
2.4
7.6
(per 500 block)
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ACCIDENT SEVERITY AND INJURY Must be reduced by
controlling Vehicular speed.
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THE CSS MANUAL Elements in the latest draft
Recurring and nonrecurring congestion
Physical design Width of street and travel
lanes, geometric design of intersections
(including roundabouts), intersection density,
block length, number of travel lanes, and
bicycle lanes Access management features, and
Signal timing, coordination and existence of
pre-emption devices Emergency and fire
strategies and tactics are specific to the
locale the fire chief should be consulted to
determine methods for operating within
context-sensitive streets. This information can
then be used to inform the street and urban
designers of the project. High levels of
street connectivity
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Imperial Dimensions Imperial Dimensions Imperial Dimensions Metric Dimensiones Metric Dimensiones
Context Zone C3 C4 C5 C6 C3 C4 C5 C6
Max. Block length with pullouts at midblock (ft) meters 650 600 500 500 198 183 152 152
Maximum Block Length, no pullouts (ft) meters 550 500 400 400 168 152 122 122
Block Perimeter (ft) meters 1800 1600 1400 1400 549 488 427 427

Standpipes required in Commercial Buildings no no yes yes no no yes yes
Apparatus Turning Model Required yes yes yes yes yes yes yes yes
Minimum Intersection Density per Square Mile hectare 300 350 400 400 116 135 154 154

Approximate Maximum Apparatus to Building Distance (ft) meters 50 40 35 35 15 12 11 11
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Modeling of the design vehicle is essential
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APA Annual Conference, Minneapolis, Mn April, 2009
CSS Manual Fire and Emergency Response Section
Peter Swift, PE
newurbanengineering.com