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City of Santa Ana <br />Pavement Management Program Update RPP No. 19-070 <br />August 6, 2019 <br />Pavement Design & Analysis <br />Pavement designs, plans, specifications, and <br />estimates (PS&E) for preventive maintenance, <br />rehabilitation, and reconstruction are NCE's <br />specialty and we offer extensive experience and <br />expertise with pavement treatment alternatives. <br />Our civil and geotechnical engineers not only <br />understand the types of pavements and <br />treatment options, they understand the significance and cost implications of proper roadway support on <br />competent subgrade soils to limit future settlement and cracking. Pavement design begins with an accurate <br />assessment of the existing structural adequacy. Unlike traditional civil firms who rely on core samples, we <br />employ our pavement survey expertise in conjunction with deflection data and materials testing to more <br />accurately assess the engineering properties of the existing roadway. <br />Sustainable and Innovative Pavement Technologies <br />There are numerous pavement rehabilitation techniques <br />available today with new binders, new additives, and <br />polymers that may be applied in various layers to preserve <br />pavement life. NCE constantly seeks to identify the most cost- <br />efficient alternatives for cities and counties, such as cold -in - <br />place recycling, full -depth reclamation, warm mix asphalt, and <br />terminal blend asphalt rubber binders. Many of the <br />technologies NCE can implement will meet the goals of the <br />City's Sustainable City Plan, even though specific pavement <br />strategies are not mentioned in the plan. Some examples of <br />cost-effective sustainable treatments are described in the <br />following paragraphs. <br />FHWA Sustainable Pavement, Pro -gram <br />`MWnia."',"x","w�w`"0y <br />imm&S.d.hmmble Pavement SyAms: Webinar Series <br />:�T4MXi4mJatlHaAvr.MLleMrercNrMgrmNJ}q es Wave Ole <br />mm..+eeeo-nao�aaAearvmmv.axw�aw�.mewuaiot�.ue <br />� <br />t d+�xds+.nbrowrrxaK+.nrcrcaa+aro anmar xLvWmYwrhetta I <br />,.z�` <br />tum.«awm..aao-ar+u�xn.wm�=n,rc.wm>wa.an <br />'. nm+naw�xwswmwawauwumxa.wwrvw�ysa3y <br />`" <br />'i� <br />MMnMa MNerrdl M4+anNi+19MN16raMIeM <br />WmeMdNrc*uniwuaWRM. <br />= <br />- --.e <br />r+u.a><e»...vam�.a.ars�mon <br />w�uu .o. <br />�eN6=PaMW+ <br />uxaMgv Nilw: <br />waEgNaerc -We9br wrfhatluan <br />wv,re W2nMvsw Pmmenn eyq�tsnw4Re <br />Ems# <br />Sustainable Pavements - NCE is involved with projects at both the national and local levels on issues <br />such as sustainable pavements and premature failures. For example, Dr. Tom Van Dam is NCE's Principal <br />Investigator for the FHWA on Sustainable Pavement Systems. He has developed technical guidelines and <br />delivered a webinar series in 2015 on this subject. <br />Cool Pavements - NCE provided cool pavement testing in the <br />City to mitigate the urban heat island impact. NCE used an <br />albedometer that includes two separate pyranometers. The first, <br />located in a glass dome on the top of the unit, measures incoming <br />solar radiation. The second, located in a glass dome directly <br />beneath the first, measures radiation reflected off the pavement <br />surface. The ratio between the two measurements is the albedo <br />of the surface. The result is used to determine the use of <br />pavement alternatives, such as porous or permeable pavements, <br />pavers, concrete pavements, and use of light-colored aggregates. <br />Cool pavement is a road surface that uses additives to reflect solar <br />radiation, unlike conventional dark pavement. Conventional dark <br />pavements contribute to urban heat islands as they absorb 80 to <br />95 percent of sunlight and warm the local air. Conventional dark <br />140IN ,' Page 15 <br />25D-18 <br />