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

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.