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SECTION 4: ROAD SECTIONS
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4.1) Introduction
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The dimensions in the following tables summarize typical road sections, as outlined
starting on the next page. The road sections illustrate the various elements expected
to be constructed at full-build out. Multi-modal features are included wherever
feasible. The road sections were developed by focusing on the access function of
each classification. It is also important to ensure that the road sections will
enable the road class to serve its intended function and purpose.
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The road sections are shown at full build-out. This takes into account the transition
of a road over time (i.e. a road starts out as a rural arterial, but as development
occurs around it, the road incorporates the elements of an urban arterial). It will
be critical for the entities to secure sufficient ROW for future expansion and/or
modification as well as to accommodate the various modes of transportation.
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4.2) Urban Sections |
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Urban Sections Classification Summary
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(All dimensions in feet)
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NUM. LANES |
ROW |
SIDEWALK |
BUFFER ZONE |
BIKE LANE |
TRAVEL LANE |
CURB/ GUTTER |
MEDIAN/ TURN LN |
PARK/ EMER. LN |
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Urban
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4
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100
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6
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5
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5
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12
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2
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14
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None
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Principal Arterial (UPA)
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Urban Minor Arterial (UMA)
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4
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100
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6
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5
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5
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12
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2
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14
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None
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2
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80
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6
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4
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5
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12
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2
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14
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None
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Urban Collector (UCol)
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2
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80
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6
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4
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5
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12
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2
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14
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None
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UCol (Residential)
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2
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60
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5
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4
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5
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12
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2
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None
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None
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UCol (Residential or Commercial)
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2
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80
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5
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4
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5
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12
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2
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None
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10
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UCol (Residential or Commercial)
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2
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80
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5
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4
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5
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12
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2
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12
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None
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NOTE: If an Urban Principal Arterial, Urban Minor Arterial, or Urban Collector includes
a shared use path, a 11’ width is recommended (10’ is minimum). See Section 8 for
shared use path guidelines.
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URBAN PRINCIPAL ARTERIALS/ URBAN MINOR ARTERIALS |
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• Bike lanes are presented as an on-street facility.
• Sidewalks are separated from travel lanes by a buffer strip.
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• Bicyclists and pedestrians share a path separate from travel lanes.
• A hybrid of on-street and off-street bicycle/pedestrian facilities is shown as
a possible option.
• Pavement material for the sidepath can vary.
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URBAN PRINCIPAL ARTERIALS/ URBAN MINOR ARTERIALS (continued) |
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• When separate from the travel lanes, the location of the bike lane, sidewalk,
and buffer can vary.
• Pavement material for the walking and biking facilities can vary.
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URBAN PRINCIPAL ARTERIALS/ URBAN MINOR ARTERIALS |
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• Bicyclists and pedestrians share a path separate from travel lanes.
• Pavement material for the sidepath can vary.
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• Bike lanes are presented as an on-street facility.
• Sidewalks are separated from travel lanes by a buffer strip.
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URBAN PRINCIPAL ARTERIALS/ URBAN MINOR ARTERIALS |
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• This section would be typically found in a residential neighborhood
• Bike lanes are presented as an on-street facility.
• Sidewalks are separated from travel lanes by a buffer strip.
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URBAN PRINCIPAL ARTERIALS/ URBAN MINOR ARTERIALS |
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• Refer to FIGURE 2 for off-street bicycle facility design
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• Refer to FIGURE 2 for off-street bicycle facility design
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4.3) RURAL SECTIONS AND FRONTAGE ROAD |
Rural Sections Classification & Frontage Summary
(All dimensions in feet) |
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NUM. LANES |
ROW |
SIDEWALK |
BUFFER ZONE |
BIKE LANE |
TRAVEL LANE |
CURB/ GUTTER |
MEDIAN/ TURN LN |
SHOULDER/ EMER. LN |
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Rural Principal Arterial (RPA)*
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4
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100
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6
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None
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None
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12
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2
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14
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10
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2
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100
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10' (Shared Use Path)
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3' (adjacent to shared use path)
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10' (Shared Use Path)
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12
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None
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16
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6' (paved shoulder)
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2
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100
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Part of shoulder
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None
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Part of shoulder
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12
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None
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16
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13' (suggest paved shoulder)
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Rural Minor Arterial (RMS) * |
2
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80
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6
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4
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5
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12
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2
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14
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None
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Urban Collector (UCol)
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2
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80
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6
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4
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5
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12
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2
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14
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Rural Major Collector (RCol)**
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2
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80
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5
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4
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5
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12
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2
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None
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10' (Park Ln)
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2
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80
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Part of shoulder
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None
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Part of shoulder
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12
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None
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None
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12' (suggest paved shoulder)
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Rural Local (RLoc) ***
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2
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60
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None
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None
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None
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12
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None
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None
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5
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2 |
60 |
5 |
4 |
None |
Varies |
2 |
None |
Varies |
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Frontage Road |
2 |
60 |
5 |
4 |
None |
11 |
2 |
14 |
None |
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* - The Rural Principal Arterial has three variations: one adjacent to urban areas,
one with a multi-modal sidepath, and one for outlying, rural areas
** - These rural road sections have variations: one adjacent to urban areas and
one for outlying, rural areas
*** - The Rural Local is based on San Juan County road sections. A variation is
provided to include sidewalks, parking, and bike lanes.
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RURAL PRINCIPAL ARTERIALS |
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•This option would be used for RPA adjacent to urban developments.
•Wide Shoulder could be used to accommodate bicyclists.
•When road transitions into a UPA, replace Wide Shoulder with bike lane and buffer
elements as shown in UPA section.
•NOTE: the median can be a minimum of 6’ for areas of a corridor that do not require
space for turn lanes.
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•This option would be used for RPA that transitions from urban to rural.
•A multi-modal sidepath could be incorporated for a corridor where access control
is established.
•Buffer material may be grass, asphalt, or striped.
•Geotechnical analysis and soil conditions must be taken into account.
•NOTE: the median can be a minimum of 4’ for areas of a corridor that do not require
space for turn lanes.
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RURAL PRINCIPAL ARTERIALS (continued) |
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•Shoulder serves as emergency lane (6’ minimum needed).
•Suggest 13’ paved shoulders to function as emergency lane and to accommodate bicyclists
and pedestrians.
•Geotechnical analysis and soil conditions must be taken into account.
•NOTE: the median can be a minimum of 6’ for areas of a corridor that do not require
space for turn lanes.
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RURAL PRINCIPAL ARTERIALS (continued) |
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RURAL MINOR ARTERIALS |
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•This option would be used for RMA adjacent to urban areas.
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•This option would be used for RMA in rural and outlying areas.
•Shoulder must be 6’ minimum.
•Suggest a paved shoulder to accommodate bicyclists and pedestrians.
•Geotechnical analysis & soil conditions must be taken into account.
•NOTE: the median can be a minimum of 4’ for areas of a corridor that do not require
space for turn lanes.
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RURAL MAJOR COLLECTORS |
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•Shoulders must be 6’ minimum.
•Suggest a paved shoulder to accommodate bicyclists and pedestrians.
•Geotechnical analysis & soil conditions must be taken into account.
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•This option would be used for RCol adjacent to urban areas.
•Additional space is given to parking lane to reduce ‘door zone’ for bicyclists.
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RURAL LOCALS |
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•Based on Standard Paved Road Section for San Juan County
•Suggest a paved shoulder for use by bicyclists and pedestrians.
•Geotechnical analysis & soil conditions must be taken into account.
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•Variation of the Standard Paved Road Section for San Juan County to include sidewalks.
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FRONTAGE ROAD |
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