Alabama Asphalt Pavement Association

1. Alabama Asphalt Pavement Association Alabama Asphalt Pavement Association 630 Adams Avenue Montgomery, AL 36104 334/834/5314 (Phone) 334/834/5537 (Fax) E-mail: alapa@bellsouth.net Web site: www.alasphalt.com

2. 2015 ALDOT PRE- CONSTRUCTION CONFERENCECONTRACTOR’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 Agg. @ $ 15.00 / Ton • RAP 5% AC And 95% Aggregate • Per Ton Value Of RAP .05 x $450.00 = $22.50 .95 x $ 15.00 = $14.25 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 ?????