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-1311 - Footnotes for Local Road and Street Design Guidelines

Current through Register Vol. 50, No. 6, June 20, 2024
A. Footnote for Item 1. The design speed may
				not be less than the current posted speed of the overall route.
B. Footnote for Item 4, RL-3 Classification.
				For ADT greater than 2,000, use 12-foot lane widths.
C. Footnote for Item 4, UL-1 and UL-2
				Classifications. Lane widths in residential areas may be reduced to 9 feet if
				necessary. Twelve foot lane widths are preferred in industrial areas.
D. Footnote for Item 5. Where bicycle
				activity is prevalent, a paved 4-foot shoulder should be provided.
E. Footnote for Item 5, RL-3 Classification.
				For ADT less than 1,500, the minimum shoulder width may be reduced to 4 feet if
				necessary. For ADT 1,500 to 2,000, use 6-foot shoulders. For ADT over 2,000,
				use 8-foot shoulders.
F. Footnote
				for Item 5, UL-1 and UL-2 Classifications. Select the shoulder width that
				corresponds to the ADT shown in the rural local road guidelines.
G. F ootnote for Items 9 and 17(a), RL-1 and
				RL-2 Classifications. The value shown should be provided on new roadways. A
				lesser value may be used on existing roads depending on soil stability,
				right-of-way constraints, the safety record of the road, and the size vehicles
				using the road. Guidance is available in the publication entitled "AASHTO
				Standards for Geometric Design of Very Low Volume Local Roads (ADT <
				400)".
H. Footnote for Item 13,
				RL-1, RL-2 and RL-3 Classifications. In Districts 04 and 05, where ice is more
				frequent, superelevation should not exceed 8 percent from the emax = 10%
				table.
I. Footnote for Item 14. 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.
J. Footnote for Item
				14. On roadways with an ADT < 400, a sharper radius may be used on fully
				superelevated roadways if necessary. For specific values refer to the
				publication entitled AASHTO guidelines for Geometric Design of Very Low Volume
				Local Roads (ADT < 400)'. Different radii apply at divisional
				islands.
K. Footnote for Item 15.
				Grades 2 percent higher may be used in rural rolling terrain.
L. Footnote for Item 17(a), RL-3
				Classification. Varies from 14 feet to 28 feet. Refer to the Roadside Design
				Guide for the applicable value. For spot replacement projects refer to the
				applicable part of footnote G for Items 9 and 17(a).
M. Footnote for Item 18. LRFD for bridge
				design.
N. Footnote for Item 19,
				RL-3 Classification. For ADT greater than 2,000, use roadway width.
O. Footnote for Item 19, UL-1 and UL-2
				Classifications. Refer to EDSM II.3.1.4 when sidewalks will be provided and for
				guardrail requirements.
P. Footnote
				for Items 19 and 20, UL-1 and UL-2 Classifications. When shoulders are
				provided, the minimum bridge width shall be the larger of that shown or the
				roadway width.
Q. General Note.
				These guidelines shall not apply to:
1. dead
				end roads (open at one end only);
2. roads that are dependent on dead end roads
				for access.