Date Roadway Designer Resurfacing Restoration and Rehabilitation Kevin Jackson, Technical Director, TLI Bentley Systems, Inc.

| 2| Overlay / Milling Components Vertical Adjustments Cross Slope Optimization Roadway Designer Overlay Tools

| 3| Objectives – Overlay Components Overlay Components Stripping Components Quantities and Reports Cross Slope Optimization Vertical Adjustments & Alignments

Overlay Tools – Overlay / Stripping Components

| 5| Add New Component > Overlay/Stripping Top Option Bottom Option Follow Surface Follow Component

| 6| Overlay Component

| 7| Create Pave + Overlay Template –Drag the Overlay_Only template into it so that the bottom of pavement and Overlay points merge. Test Run Roadway Designer –Change to Pave+Overlay template –Note that Overlay now extends full width

| 8| Stripping Component

| 9| Create a Pavement+Overlay template –Add a Milling Component –Match the bottom three points Test Create a Pavement + Overlay + Milling Component Run Roadway Designer

| Multiple Layers Different Overlay Layers? –Use Follow Lowest / Follow Highest

| Review the 05_OverMill_Complicated Corridor (multiple overlay layers, saddlebags, quantities)

| Standard: End-Area Volume Reports Quick: Component Quantities –Provides Component Quantities and Costs –Not exact: good for quickly comparing alternatives –For “complete” quantities use the full End-Area Volumes functionality Component Quantities

| Run Roadway Designer Launch Component Quantities Walk the Corridor Disable Parametric Constraints

| Reports on Overlay/Stripping components that have the Stripping option set. Milling Stylesheet (set Default) Milling Report

| Generate a Milling Report

Overlay Tools – Vertical Adjustments

| Overlay Overlay + Max Milling Min. Milling w/ & w/o Max. Milling Vertical Adjustment Scenarios

| Structural Integrity of new Backbone Minimum amount of overlay material (minimum overall overlay thickness) Full-width Milling Milling: maximum depth of high-point milling Vertical Adjustments: the Engineering

| Given a template, it determines the Template Top. –This is the triangulated surface –Regardless of the complexity of the template, the Top is a simple left-to-right linestring It compares the vertices in the Top to the vertices in the Active Surface It finds the Minimum (or Maximum) Vertical Difference value It adds the Backbone Thickness, Overlay and/or Milling values to determine an Adjustment Value. –Adjustment is completely independent of anything other than the Top line and the Surface Vertical Adjustments: the Methodology

| Determined from Top segments in the template –Everything under the top ignored The Backbone Thickness is used in Adjustments Template Top

| Horizontal Range of Comparison must be defined Template Top –User Selects Two Template Points to define the left and right ends Existing Ground Range –Use the Template Points used for the Top –Or - Follow Alignments, Features or Styles –Or - Fixed Offsets Vertical Adjustments Horizontal Range

| Solution Options –Compare at Template Points Only or at all Section Points –Maximum Difference can be set Vertical Adjustments Comparisons

| Critical Points and Vertical Delta Only Two Comparison Points/Vertical Deltas matter: Zero Overlay Point and Minimum Milling Point

| Vertical Adjustment Geometry Critical Point = Min. Milling Point for Min. Milling Zero Overlay Point for Overlay Critical Delta = Existing Surface Elev. - Template Top Elev. at the Critical Point Direction matters + is up, - is down

| Minimum Milling Top is moved to the lowest position where it intersects the existing surface Establishes “Bottom” of backbone

| Backbone Thickness (always positive) is added to the (positive or negative) Min. Milling Delta –Adjustment = Min. Milling Delta + Backbone Thickness Backbone Thickness

| In Roadway Designer select the 02_Pavement* Corridor Select Display Mode: Overlay Vertical Adjustments: Set Template & ex Ground Range Select Use Minimum Milling Walk the Corridor, observe

| Step 1: Find the Minimum Overlay point: the intersection between the top and the existing ground where the Top is highest Minimum Overlay

| Minimum Overlay Value –Between Backbone Bottom and high point of existing (Minimum/Zero Overlay Point) –Zero or greater –Added to Adjustment Overlay Settings

| Steps 2 and 3: Add the Minimum Overlay Value to the Zero Overlay Delta and add the Backbone Thickness Minimum Overlay

| In Roadway Designer select the 02_Pavement* Corridor Select Display Mode: Overlay Vertical Adjustments: Set Template & ex Ground Range BB=0, Min Overlay = 0 Walk the Corridor, observe

| Change the Backbone Thickness to 0.2 ft [0.1m] Walk the Corridor, observe Change the Minimum Overlay to 0.2 ft [0.1m] Walk the Corridor, observe

| Sets a maximum limit to milling Milling is limited to –Maximum Milling Value or –Minimum Milling Point (full-width milling) Minimum Milling with Maximum Milling

| Set to Minimum Milling Select the Maximum Milling option Key in 0.1 [0.05] Walk the Corridor, observe

| Mills out High Points Requires less Overlay Material than with no milling Can save significant money Minimum Overlay with Max Milling

| Milling Adjustment value is the last adjustment Total Adjustment is never negative Milling Adjustment is limited by –The Max Milling Value or –Zero Adjustment point Minimum Overlay with Max Milling

| Change the Maximum Milling depth to 0.1 [0.05] Walk the Corridor, observe Change the Corridor Vertical to None Walk the Corridor, observe

| Vertical Adjustments do not require vertical alignments Components behave the same regardless of how they’re controlled vertically. To “Permanently Save” the Adjustments you’ll need to make an Alignment: –Smooth Adjusted Vertical Alignment –Apply Adjusted Vertical Alignment Final Cleanup: can use standard alignment tools Vertical Alignments

| Smooth the Vertical Adjustment Save the Vertical –envelopes Review the Vertical Push the Corridor w/o Adjustments (go w/ adj. to see if the Adjustment deviates from 0.0) –If different: verify that the Adjustment settings were the same