Presentation on theme: "Welcome to Inspecting Maintenance of Traffic Items on Projects"— Presentation transcript:
1Welcome to Inspecting Maintenance of Traffic Items on Projects Name/Background - Stefanie Maxwell, graduated from Georgia Tech with BS in Civil Engineering, started working for the Department, 2 weeks after graduating from college, started as a Professional Engineer Trainee in D2;have worked for Department for 16 years, 10 years of which were in the field inspecting maintenance of traffic as a Project Engineer and Permits Engineer, and 6 years as a Specialty Engineer for Maintenance of Traffic issues.Determine makeup of class; i.e., Department employees, consultants, contractors?Presented by:Stefanie D. Maxwell, P.E.FDOT Central Office ConstructionFebruary 2010
2Goal Quickly and correctly inspect maintenance of traffic (MOT) items Using the tools providedDetermine whether the MOT items are in compliance with the contractMy goal for you is: You will be able to quickly and correctly inspect MOT items, using the tools and resources provided in the training, and determine whether the MOT items are out of compliance with the contract.The tools and resources can then be used to document incompliance and ultimately bring the items back into compliance with the contract.
3How did we determine what MOT items? MOT Process ReviewsReview 4 districts per yearConcurrence with the ContractResource: Guidelists and Critical RequirementsHow did we determine what MOT items to discuss? Because of the opportunities for improvements discovered from performing Maintenance of Traffic (MOT) process reviews, this training course was put together and includes a presentation with hands-on training, to teach students how to quickly and correctly inspect pavement markings, work zone sign supports, temporary traffic control devices and a few other miscellaneous MOT items. Maintenance of Traffic Reviews are typically performed in 4 districts per year, where the remaining 4 districts are reviewed in the following year, about one per quarter, evaluating each district on a two year cycle. The reviews consist of on-site project visits to review the MOT setup as well as a review of the required documentation in the project files. The field visits are followed up with free training (this course) for the district, inviting construction, maintenance, consultant personnel and contractors. The training topics vary as the most frequently occurring opportunities for improvements are discovered when performing MOT Reviews throughout the state. Last year, the most frequently occurring opportunities for improvements were inspection of: pavement markings, work zone sign supports, and temporary traffic control devices. This year we are going to focus on Barrier and Crash Cushions.Critical Requirements
4Outline Inspecting Pavement Markings Inspecting Work Zone Signs and SupportsInspecting Temporary Traffic Control DevicesMiscellaneous MOT IssuesLast year, the most frequently occurring opportunities for improvements were inspection of: pavement markings, work zone sign signs and supports, and temporary traffic control devices.This year we are going to focus on Barrier and Crash Cushions.The three topics that we are going to touch on today are:Inspecting Pavement MarkingsInspecting Work Zone Signs and SupportsAndInspecting Temporary Traffic Control Devices
5Inspecting Pavement Markings We will start with Inspecting Pavement Markings
6Inspecting Pavement Markings Test pavement markingsRetroreflectivityThickness (Thermo)Pavement markings are tested for retroreflectivity and thickness (only for thermoplastic).
7Inspecting Pavement Markings Florida Sampling and Testing Method FM 5-541Located on State Materials Office website:Link to FSTM'sRetroreflectivityAverage of 3 retroreflectivity measurementsOne at the beginning, middle, and end of each one mile section.Take in the direction of travel.Thickness (Thermo)Take average of 3 location measurement (avg. of 3 dial gauges) at the beginning, middle, and end of each one mile section of line type (i.e. color, solid, skip).When inspecting pavement markings, the Specifications require that you measure, record and certify pavement markings in accordance with FMThe Florida Sampling and Testing Methods are located on the State Material’s Office website and the link is provided on the slide.The FM requires that you average 3 retroreflectivity measurements – one at the beginning, middle and end of each one mile section, and it is required to be taken in the direction of travel.
8Inspecting Painted Pavement Markings SpecificationsRetroreflectivity (Initial)300 white250 yellowMinimum retroreflectivity150 for both white and yellowContractor to submit certification for retroreflectivity but FDOT has 3 days from receipt of the certification to verify that it meets initial valuesWhen inspecting painted pavement markings, Specifications provide the requirements for retroreflectivity.The initial retroreflectivity requirements are 300 for white and 250 for yellow.The minimum retroreflectivity allowed by the spec is 150 for both colors.Contractor is responsible for submitting certification for retro at any time and FDOT has 3 days from receipt of cert to verify initial numbers
9Form number 700-050-70 Put copy of Retroreflectivity form here This is certification form.You can find this form at the link at the bottom of the form.
10Inspecting Thermoplastic Pavement Markings Specifications- Retroreflectivity – Standard Double Drop Thermo450 white350 yellow180 days observation periodContractor submits certification for retroreflectivityRetroreflectivity of thermoplastic in accordance with Specifications, Subarticle , Florida Test Method Retro 450 – white, 350 – yellow; contractor to certify retro, maintain 450 and 350 for 180 days.PART A - Project Based Testing of Traffic Marking Materials2. TYPES OF TESTING REQUIRED:2.1 Thickness for thermoplastic materials2.2 Retroreflectivity for all traffic marking materials3. EQUIPMENT:3.1 Traffic Striping Thickness gauge as described in Section 4.1(Fig. 1).Thickness gauges may be purchased or fabricated.3.2 Utilize a 30 meter retroreflectometer meeting the requirements of ASTM E1710.4.2 Retroreflectivity:Perform three retroreflectivity measurements, one at the beginning,middle, and end of each one mile section. A total of three readings arerequired and the average is used for acceptance. Retroreflectivitymeasurements shall be taken in the direction of travel. Calibrate theinstrument at the beginning of each day of use per the manufacturer’sinstructions. Perform additional calibrations if testing conditions change,e.g. substantial change in ambient temperature or irregular readings.4.2.1 Longitudinal LinesTake measurements at the beginning, middle, and end of each onemile section of line type (i.e. color, solid, skip).4.2.2 Messages, Symbols, and Transverse LinesPerform at a minimum, one retroreflectivity measurement at onemessage, one symbol and one transverse line per intersection.Take one measurement per mile for locations other thanintersections (i.e. school messages, railroad messages, bikesymbols, etc.)
11Inspecting Thermoplastic Pavement Markings Thickness – Standard Double Drop ThermoMinimum: 100 mils or inchesMaximum: 150 mils or inchesThermo is required to meet the thickness requirements of the Specifications, Subarticle , Florida Test Method 5-541, inches minimum to inches maximum for double drop bead thermoplastic.From FM 5-541:4.1 Thickness:Measure the thickness of thermoplastic striping using an apparatus employing three dial indicators with the measuring points spaced 2 ½ inches apart (see Figure 1). Center the thickness gauge over the marking material in an area avoiding glass spheres and read the values of all three dial indicators. The location thickness measurement is the average of the three dial indicators. Take one measurement at the beginning, middle, and end of each one mile section of line type (i.e. color, solid, broken/skip). The average of the three location measurements shall be used for acceptance of the one mile section of line type.
12Inspecting Thermoplastic Pavement Markings Audible/Vibratory MarkingsRetroreflectivity300 – white and yellowThicknessBase Line: 79 to 120 milsRequires transverse bar/bump/cookie – min height 0.45 inches or 450 mils, including base lineThe audible vibratory markings and wet weather markings have a different base line thickness. Audible and vibratory markings base line thickness is 79 to 120 mils and requires transverse audible bars (bumps/cookies). Minimum height on audible bars: inches, includes base line.4.1 Thickness:Measure the thickness of thermoplastic striping using an apparatusemploying three dial indicators with the measuring points spaced 2 ½inches apart (see Figure 1). Center the thickness gauge over the markingmaterial in an area avoiding glass spheres and read the values of all threedial indicators. The location thickness measurement is the average of thethree dial indicators. Take one measurement at the beginning, middle,and end of each one mile section of line type (i.e. color, solid,broken/skip). The average of the three location measurements shall beused for acceptance of the one mile section of line type.Thermo CookieThermo Bump
13Inspecting Thermoplastic Pavement Markings Wet Weather MarkingsRetroreflectivity300 – white, 250 – yellowThickness MeasurementsProfile Marking: 155 mils min. for profile height at one inch on center, base line of 35 to 50 mils heightFlat line – 100 to 150 mils thicknessThickness and Dimensions of Markings: For flat thermoplastic markings with wet reflective elements, provide a thickness of 0.10 to 0.15 inches when measured above the pavement surface.For profiled thermoplastic markings, provide a minimum height of inches for the profile when measured above the pavement surface. Provide a baseline thicknessof of to inches. Provide individual profiles across the full width of the marking at approximately 1.0 inch on center with a space between profiles of to inches.Dimensions of Audible Bumps: Apply the raised bump with a profile such that the leading and trailing edge are sloped at a sufficient angle to create an audible and vibratory warning.Bumps on shoulder and centerline markings shall have a minimum height of 0.45 inches, including the base line. The height shall be measured above the pavement surface, after application of reflective elements. Bumps shall have an approximate length of 2.5 inches. Bumps may have a drainage channel, the width of each drainage channel will not exceed 1/4 inch at the bottom of the channel. The longitudinal distance between bumps shall be approximately 30 inches.Retroreflectivity: Apply white and yellow traffic stripes and markings that will attain an initial dry retroreflectivity of not less than 300 mcd/lx·m2 and not less than 250 mcd/lx·m2, respectively, and also attain an initial wet retroreflectivity of not less than 150 mcd/lx·m2 and not less than 125 mcd/lx·m2, respectively. ASTM E2177 shall be used to measure the wet retroreflectivitity. The dry retroreflectance of the white and yellow pavement markings at the end of the three year service life shall not be less than 150 mcd/lx·m2, and also the wet retroreflectivity at the end of the service life shall not less than 75 mcd/lx·m2.4.1 Thickness:Measure the thickness of thermoplastic striping using an apparatusemploying three dial indicators with the measuring points spaced 2 ½inches apart (see Figure 1). Center the thickness gauge over the markingmaterial in an area avoiding glass spheres and read the values of all threedial indicators. The location thickness measurement is the average of thethree dial indicators. Take one measurement at the beginning, middle,and end of each one mile section of line type (i.e. color, solid,broken/skip). The average of the three location measurements shall beused for acceptance of the one mile section of line type.Wet Reflective Elements in flat lineProfile Marking
14Inspecting Work Zone Signs We will move to Inspecting Work Zone Signs
15Work Zone Signs Sign supports in compliance with: Vendor drawing on QPLDesign Standards SeriesSpecs – Section 102There are three common places to look for information on work zone sign supports. The Vendor Drawings on the QPL, the Design Standards – Index 600 Series and Specifications – Section 102.Install sign supports in accordance with Vendor drawings on QPL, Design Standards, Index 600, and Specifications, Article
16Work Zone Signs QPL # labeled on sign support Make sure that the QPL number for sign support is labeled per Specifications, Article for both post-mounted and portable.
17Work Zone Signs Verify work zone sign supports are on QPL QPL Website:Verify that the labeled work zone sign supports are on the QPL. Here is the website link and a snapshot of what it looks like.
18Work Zone SignsVerify sign supports are installed in accordance with the Vendor Drawings on QPLVerify that the sign supports are installed in accordance with the vendor drawings, portable or post mounted.
19Work Zone Signs Verify Sheeting Retroreflectivity Specifications 994-5 ASTM-495680% of values in tableSpecifications 102-9ATSSA Quality Guidelines for Temporary Traffic Control Devices and FeaturesSheeting retroreflectivity in accordance with Specifications, Article 994-5, ASTM D-4956, and 80 % of values in table.
20Work Zone SignsDesign Standard Index #600, Sheet 6
21Work Zone Signs Number of u-channel Posts depends on Sign Size 1 2u-channels3u-channelsThis is the table from Index 600, Sheet 6.Number of u-channel posts depends on sign size
22Work Zone Signs Clear height depends on Post size: 3 lb/ft up to 10 feet clear height4lb/ft up to 12 feet clear heightFoundation Depth depends on post size:4 feet for 3 lb/ft4.5 feet for 4 lb/ftExceptions:Foundation depth in rockSoil plate not required in rock, asphalt and shoulder pavement, and sidewalk.This is the table from Index 600, Sheet 6.Clear height depends on post sizeFoundation depth depends on post sizeSoil plated required minimum 4 inches below ground – see exceptions in table for installing in asphalt roadway or shoulder or in rock.
23Ground line at centerline of sign Work Zone SignsClear HeightBottom of Sign10 feet for 3 lb/ft12 feet for 4 lb/ftClear height depends on post size7 foot mounting height required on all wz signsGround line at centerline of sign
24Work Zone Signs Mounting height Bottom of Sign7 feet minMeasured from a line projected from theedge of travel wayelevation
25Work Zone Signs Spliced Post Mounted Supports Stub HeightDesign Std - Maximum Stub height is 4 inchesVendor Drawing allows 0 to 4 inches from existing ground (cannot be below ground)Stub Height > 4”WRONGDesign Standards, Index 600, Sheet 6
26Work Zone Signs Spliced Post Mounted Supports Top Bolt1 inch minimum from top of stub or cutting edgeMinimum 1 inchDesign Standards, Index 600, Sheet 6
27Work Zone Signs Spliced Post Mounted Supports Vendor Drawings requireBase Post in Front (traffic approaching)Sign Post in BackSign PostBase Post
28Work Zone Signs Spliced Post Mounted Supports Splice overlapVendor Drawings require 6 inches for both typesMinimum6 inches overlap
29Work Zone Signs Spliced Post Mounted Supports Bolt SpacingVendor Drawings require 4 inches for both typesBolts spacing should be 4”WRONG
30Work Zone Signs Spliced Post Mounted Supports Same size posts for spliceVendor Drawings require base post and sign post to be the same size.WRONG
31Work Zone Signs Post mounted Work Zone Sign Supports - Nucor Marion Rib back3 #/ft4 #/ft
32Work Zone SignsPost mounted Work Zone Sign SupportsFranklinFranklin
44High Visibility Safety Apparel Index 600, Sheet 4
45High Visibility Safety Apparel All workers within Right-of-Way shall wear:ANSI/ISEA Class 2 ApparelOrange or Yellow/Green in ColorAll flaggers within Right-of-Way shall wear:Daytime - ANSI/ISEA Class 2 ApparelNighttime - ANSI/ISEA Class 3 ApparelOrange or Yellow/Green in Color
46Placement of Stripe24 foot roadway – includes stripes