Location & Design Manual - Volume 1
LDM Section 100 – Design Controls and Exceptions
105.3 National Network - changed guidance for design exceptions on National Network
LDM Section 300– Cross Section Design
301.1.4 Pavement Transition / Taper Rates - added guidance
301.2.3.1 Right Turn lane Shoulder Width - added guidance
305.2 Types and Uses - added Type 9 Curb
LDM Section 400 – Intersection Design
401.2.3 Roundabouts - added guidance for analysis
401.6.4 Double Right Turn Lanes - modified guidance
403.6.12 Spirals - provided additional guidance
LDM Section 500 – Interchange Design
550.1 General - provided additional guidance
550.2.1 interchange Operations Study (IOS) - provided additional guidance for use of certified traffic
LDM Section 600
600.2.3 Operational Offsets on Urban Streets - clarified guidance
602.2.2.3 Cable Anchors - length of need should be shown on the plans
LDM Section 900 – Access Control, R/W use Permits and Drive Design
904.2 Landscaping Elements & Fixed Objects - added additional guidance for aesthetic fixed objects.
LDM Section 300– Cross Section Design
308.5.4 added text to clarify the use of gutter with bike lane width
403.4.1 provided additional guidance
403.4.6 Added section
403.4.6 added guidance for approach design
403.6.9 added guidance for splitter island design
550.2 Interchange Study - added certified traffic guidance
550.2.1 Added guidance for the use of certified traffic
Glossery – Defined Shy-Line Offset and Shy Distance
July 17, 2015
301.2.3, 301-4 and 301-3 Language added - shoulder width reductions of less than 2' at sign or luminaire foundations or bridge piers will not require a design exception.
307.2 Other Agencies BMPs not to be located on ODOT R/W.
IOS Language Added.
Figure 600-2 Reference to obsolete Section 900 removed.
BMP's added as a hazard.
MGS with no blockouts language added.
MGS with one post missing language added.
Figure 401-8 Updated
Section 550.4 Environmental Studies Updated.
Figures 505-2a & 2b no longer label non mainline vs all facilities
Language added to clarify that providing median barrier on divided highways that do not have full access control should be based on Engineering Judgment.
Language added regarding cable barrier placement and overlap – Figures 602-3a, 602-3b, 602-4a, 602-4b updated to clarify the intent.
Language added that reduced guardrail post spacing should begin upstream of where the actual reduction in deflection is needed
New Section 801.2.6 Locked-Gate Access to Freeways and other Limited Access Highways
Figure 803-3 the 4’ value was removed from the dimension on the Isometric view
Appendix B – Sample Plan Notes updated.
Section 100 – A couple sentences have been clarified regard where the Design Exception documentation will be retained.Section 300 – Launguage tweaked regarding pedestrian facilities, and a new section for on-street bicycle facilities was added.- Figure 301-3 Rural Shoulder Criteria updated to accomodate grading requirements for type MGS Guardrail- Change to Figure 301-2Section 700 – Section & Figures added for Shared Use Path Design
Updated Figure 602-1 to reflect the new runout lengths in the AASHTO Roadside Design Guide. This effectively reduces Length of Need calculations.
The Sample Calculations in Section 600 were updated to utilize the new Runout Lengths
January 20, 2012
-In section 101.3 the "Office of Urban and Corridor Planning" has been replaced with "Office of System Planning and Program management".-In section 105.1 the word "guardrail" has been replaced with the word "barrier".
-In section 602.1.1 the word "guardrail" has been replaced with the word "barrier".-The office title "Roadway Engineering Services" has been replaced with "Roadway Engineering".
-Replaced Planning Administrator and Production Administrator with Planning and Engineering Administrator
-Revised section 307.2.5 and Figure 307-5E
-Revised sections 602.2.2.2, 603.1.4.1, 603.1.4.2, 603.1.4.6, 603.3.2, 603.3.3, 603.4, 603.4.1, 603.4.2, 603.4.3, 603.4.4, 603.4.5
-New Figures 602-3E and 602-4E
-Revised Figure Index
-Revised Plan Notes R112, R113, R123, R124, R125-New Plan Note R127
-Revised the dates for the reference manuals under "Application" and "Design Reference Documents"
-Section 603.3.4 no longer allows Type A's to be installed on the NHS system.
Traffic Analysis Criteria moved to newly created Appendix C
-Page format updated to match the rest of the manual
-Figure 203-6E -minor typo corrected
-304.3.2 & Figure 303-1 E, curbed median minimum width = 4'
-306.3 rewritten and Figure 306-4E & Figure 306-5E updated accordingly
-Reference to Appendix C added
Figures 503-1a, 503-2c, 505-1a, 505-1b updated
600.2.2 Clear Zone on Low Speed Urban Streets -language clarification
602.2.2.2 Cable Barrier Placement in Median updated
Figure 601-2 Median Barrier requirements are specifically intended for Freeways
Figure 600-4 Legend has been corrected
Section 805.3 Commercial Drives Table Updated on page 8-11
Appendix C - new
Reference Table of Contents was missing from last update, it was put back in.
Language removed and "Refer to Section 602.15" added
Language below the table revised
Notes to Figure 302-1
Language revised in I, J, K
Language revised in the last bullet point
Figure 600-3 and 600-4
These are new figures
Roadside Safety Landscaping Guidelines
Language in sections 4 and 5 has been revised, Figures have been revised
Revised Section 105 to match changes to Section 503.2
Corrected the radius for a 12°00' curve
Revised to allowable grade values for Urban Locals prior to 2006
Figure revised to clarify how close an allowable grade break can occur to a vertical curve.
Added Note C to the values for Locals with 1501 to 2000 ADT at 55 and 60 mph
Figure 301-3 and Notes
Deleted Notes I and L since they no longer apply. References to the notes were revised in the figure. Revised Note N to also include the right shoulder. (Without the revision we could have a situation where the right shoulder would have been 8' and the median shoulder would have been 10' or 12')
Revised Note H to include the right shoulder. Added reference to Low Volume Roads for Collector and Local Streets with ADT<400.
Change the 8.1 to 8.0 for 20' pavements at 30 to 39 mph with a 14°30' curve.
Added the rest of the note that is contained on Exhibit 10-68 of the AASHTO Green Book which states that 300' should separate the taper and gore of successive entrance ramps. (Actually AASHTO says 90 m (270') but converting metric to English is 295') Also added a drawing to clarify the location of gore points.
Revised Section 503.2 to clarify when design exceptions are required for ramps for speed related design criteria.
Many section revised.
Plan notes updated to agree with vendor shop drawings.
Sections 4.1 and 4.4 revised.
306.3.1 Curb Ramp Locations
Section 306.3.1 - revised text
October 17, 2008
100 (All of 100's text is included):
Section 104.2 - revised text
Section 106 - new section
Figure 105-1 - removed "Curve Widening" row from figure
Figure 106-1 to 106-5 - Five new flow charts for Section 106
Three new design exception samples - formatted as "Examples" to match other examples in Volume 1.
300 (only the affected pages are included):
Section 305.3.2 - Title change (only the affected pages of 300 are included)
Section 305.3.3 - last paragraph changed "face of guardrail" to "barrier offset"
Figure 301-2 - Rick changed the ADT rows to match the Green Book and any subsequent Rural Lane Widths
Figure 301-3 - Rick changed the ADT rows to match the Green Book and any subsequent Rural Shoulder Widths
Figure 301-4 - Rick changed the lane and shoulder widths, and Note B
Figure 303-1 - Changed title in right most column, changed Note G
500 (just this figure is included):
Figure 503-3c - Added the Exit Curve Table and revise Note 1
Minor changes to three figures:Figure 202-9 - Radius for 12 degrees should be 478 feet.Figure 301-4 - Added Note J, which reads "Use 4 foot minimum lateral clearance when adjacent to longitudinal barrier or bridge parapet".Figure 503-3c - Fixed incorrect figure reference in detail and revised double asterisk note.
Section 601.4 - New text on Barrier Considerations for Large Trucks as per NTSB, FHWA and NCHRP Report 505.
Various minor changes, mostly to Figures in Sections 200, 300 and 500.
October 29, 2004
Section 400, Geometric Design divided into two sections, Section 400 for Intersection Design and Section 500 for Interchange Design.
Various revisions to the Preface, Section 100, 300, and 600. New Appendices A and B.
Revised Section 100 (except for Design Exception Examples). Revised Section 600 (Metric Sample Calculations to be posted later).
New Preface, Glossary & Reference Documents, Revised Section 300, Section 500 Rescinded (included in new Traffic Engineering Manual).
Revised Section 200.
Inclusion of "Guidelines for Identifying Acceptable Locations for the Disposal of Waste Material and Construction Debris or the Excavation of Borrow Material Within ODOT Right-of-Way" in Reference Section.
Inclusion of "Landscaping Guidelines" in Reference Section.
Added Section 1500 - "Plan related Actions" to Volume 1 web-page.
Revised Sections 100 & 600. Rescinded Section 700 - "Pavement Design" and replaced with "Multi-Modal Considerations."