1. Alabama Asphalt Pavement Association
630 Adams Avenue
Montgomery, AL 36104
334/834/5314 (Phone) /834/5537 (Fax)
Web site:

2. 2015 ALDOT PRE- CONSTRUCTION CONFERENCE CONTRACTOR’S PERSPECTIVE ON CROSS SLOPE
MAY 7 , 2015

4. CROSS SLOPE CURVE SECTIONS TANGENT SECTIONS GENERAL ISSUES
OTHER ISSUES

5. CURVE SECTIONS

6. CURVE SECTION DATA NEEDED
PC STATION
PT STATION
BEGIN TRANSITION STATION
END TRANSITION STATION
REQUIRED CROSS SLOPE

7. CURVE SECTION DATA ISSUES
PC STATION AND PT STATION ON PLANS OFTEN DO NOT MATCH PC STATION AND PT STATION IN FIELD.
REQUIRES FIELD ADJUSTMENTS DURING CONSTRUCTION. POSSIBLE QUANTITY CHANGES.
SUGGEST ALDOT VERIFY AND STAKE FIELD LOCATIONS PRIOR TO PROJECT LETTING.

8. TANGENT SECTIONS

9. TANGENT SECTION DATA NEEDED
CROSS SLOPE REQUIRED OR MATCH EXISTING CROSS SLOPE.

10. GENERAL ISSUES

11. GENERAL ISSUES CROSS SLOPE VERSUS SPREAD RATE.
IF MATCH EXISTING CROSS SLOPE, SPREAD TOLERANCES CAN GENERALLY BE MAINTAINED.
IF CORRECTING CROSS SLOPE, SPREAD RATE TOLERANCES CAN NOT BE MAINTAINED. PAY ITEM NEEDS TO BE SPECIFIED AS LEVELING.

12. GENERAL ISSUES MILLING VERSUS LEVELING.
EASIER AND MORE ECONOMICAL TO MILL IN CROSS SLOPE VERSUS LEVELING IN CROSS SLOPE WHEN ROADWAY STRUCTURE ALLOWS.
NO SIGNIFICANT COST INCREASE TO MILL 1” VERSUS 2” VERSUS 3” , ETC.

13. GENERAL ISSUES
MANY TIMES EASIER TO MILL IN TANGENT SECTIONS THAN CURVE SECTIONS.
CURVE SECTIONS GENERALLY LACK CROSS SLOPE RATHER THAN HAVING TOO MUCH CROSS SLOPE. PARTIAL LANE MILLING CAN STILL BE EVALUATED.

14. Economics Of RAP Value Of RAP Assume AC Liq. Ton @ $450.00 / Ton
Assume Virgin $ / Ton
RAP 5% AC And 95% Aggregate
Per Ton Value Of RAP
.05 x $ = $22.50
.95 x $ = $ One Ton Of RAP = $ 36.75*
*Does not include costs to mill, haul and process

15. GENERAL ISSUES
MILL / FILL INFORMATION TABLES. PROVIDES APPROXIMATE DEPTHS OF MILL / FILL ALONG PROJECT AT VARIOUS STATIONS. CHECK ACCURACY OF DATA.
VALUABLE INFORMATION FOR CONTRACTOR TO EVALUATE DEPTH OF FILL VERSUS MAXIMUM ASPHALT LAYER LIFT THICKNESS. DETERMINES HOW MANY PASSES REQUIRED TO PLACE REQUIRED LEVELING THICKNESS.

16. GENERAL ISSUES
NEED ACCURATE QUANTITIES OF MILLING AND LEVELING FOR BIDDING PURPOSES.
LEVELING QUANTITIES ARE MORE FREQUENTLY INACCURATE THAN MILLING QUANTITIES. QUANTITIES ARE GENERALLY UNDERESTIMATED.
SITE VISIT BY DESIGNERS MAY HELP EVALUATION OF THESE AND OTHER QUANTITIES.

17. GENERAL ISSUES
ROADWAY DENSITY FOR LEVELING LAYERS SHOULD BE MAXIMUM ACHIEVEABLE DENSITY FROM ROLLER PATTERNS ESTABLISHED BY NUCLEAR / NON-NUCLEAR GAUGES.
CORES AND TARGET PAY FACTORS ARE NOT REASONABLE FOR ROADWAY DENSITY FOR LEVELING LAYERS.

18. OTHER ISSUES

19. OTHER ISSUES
WHENEVER POSSIBLE ESTABLISH PAY ITEMS AND QUANTITIES FOR REQUIRED WORK.
MAKING REQUIRED WORK SUBSIDIARY OBLIGATION OF OTHER PAY ITEMS CREATES UNKNOWN QUANTITIES / SCOPE OF WORK FOR CONTRACTOR.
UNKNOWN = ADDED $$$$$$$$.

20. OTHER ISSUES
CONTRACTOR REVIEW OF PRELIMINARY PLANS FOR COMPLEX / LARGE PROJECTS.
CONTRACTORS CAN SUBMIT IDEAS ON SEQUENCE OF CONSTRUCTION, CONSTRUCTABILITY OF PROJECT, ETC. MONTHS BEFORE TWO WEEK BID ADVERTISING WINDOW.
MORE COMPLETE AND ACCURATE PLANS = LESS UNKNOWN = REDUCED $$$$$$.

21. OTHER ISSUES TEMPORARY EDGE LINE STRIPE ON RESURFACING PROJECTS.
ELIMINATING PAY ITEM GENERALLY DOES NOT REDUCE PROJECT COST.
CONTRACTOR LIABILITY ISSUES.
SCORING PAVEMENT SHOULDERS.

22. Questions ?????