Louisiana Administrative Code › Title 70 - TRANSPORTATION AND DEVELOPMENT › Part I - Highway Construction › Chapter 13 - Design Guidelines for Freeways, Arterial, Collector, and Local Highways under the Jurisdiction of Political Subdivisions and Not in the State-Maintained System › Section I-1323 - Footnotes for Urban and Suburban Collector Design Guidelines

Current through Register Vol. 50, No. 6, June 20, 2024
A. Footnote for SC-1, SC-2 and SC-3
				Classifications. These guidelines may be used only on a rural roadway section
				that adjoins a roadway section currently classified as urban. The
				classification selected should be based on the posted speed.
B. Footnote for Item 4, UC-2 and SC-3
				Classifications and for Item 5(b), UC-1 and UC-2 Classifications. For ADT less
				than 2,000 refer to Exhibit 6-5 on page 425 in the "2004 AASHTO Policy on
				Geometric Design of Highways and Streets."
C. Footnote for Item 5(a), SC-3
				Classification. Applicable to depressed medians only.
D. Footnote for Item 5(b), UC-1, UC-2, SC-1
				and SC-2 Classifications. Curb may be used instead of shoulder. Where bicycle
				activity is observed, a bike lane should be considered.
E. Footnote for Item 5(b), SC-3
				Classification. If curb will not be used, shoulder widths may be reduced, see
				Footnote B (for Item 4). When curb is used on multilane facilities, it shall be
				placed at the edge of shoulder. When curb is used on 2-lane facilities, 8 foot
				shoulders will be required if a future center turn lane will be added. Curb
				will not be placed in front of guardrail.
F. Footnote for Item 7, UC-1 and SC-1
				Classifications. Seven and 8-foot widths are limited to residential areas for
				30 and 40 mph respectively.
G.
				Footnote for Item 8(c), UC-1, UC-2, SC-1 and SC-2 Classifications. Cannot be
				used on multilane roadways (with four or more through lanes) without Chief
				Engineer's approval.
H. Footnote
				for Item 9. If shoulders are used, sidewalks should be separated from
				shoulder.
I. Footnote for Item 10,
				UC-1 and UC-2 Classifications. Where shoulders are used, 1:4 minimum fore
				slopes are required through the limits of minimum clear zone.
J. Footnote for Item 11, UC-1 Classification.
				1:2 back slopes are allowed where right of way restrictions dictate.
K. Footnote for Item 15. It may be necessary
				to increase the radius of the curve and/or increase the shoulder width (maximum
				of 12 feet) to provide adequate stopping sight distance on structure.
L. Footnote for Item 15. Different radii
				apply at divisional islands. See Footnote G for "Minimum Design Guidelines for
				Urban Arterial Roads and Streets."
M. Footnote for Item 17. Whe re the roadway
				dips to pass under a structure, a higher vertical clearance may be necessary.
				An additional 6 inches should be added for additional future
				surfacing.
N. Footnote for Item
				18(a), SC-3 Classification. The higher value is applicable to roadways with an
				ADT greater than 6,000.
O. Footnote
				for Item 18(b), SC-3 Classification. These values apply to roadways with 8-foot
				shoulders. For outside shoulders less than 8 feet, further increase should be
				proportional to the reduced shoulder width.
P. Footnote for Item 19. LRFD for bridge
				design.
Q. Footnote for Items 20(a)
				and 21, UC-1, UC-2, SC-1 and SC-2 Classifications. Refer to EDSM II.3.1.4 when
				sidewalks will be provided and for guardrail requirements.
R. General Note. DOTD pavement preservation
				minimum design guidelines or 3R minimum design guidelines (separate sheets)
				shall be applicable to those projects for which the primary purpose is to
				improve the riding surface.
AUTHORITY NOTE:
				  Promulgated in accordance with
				  R.S.
				  48:35(C).