road & bridge design publications · 2020. 12. 30. · road & bridge design publications monthly...

Road & Bridge Design Publications

Monthly Update – December 2020

1

Revisions for the month of December are listed and displayed below and will be included in projects submitted for the April letting. The special detail index from October will remain in effect. E-mail road related questions on these changes to [email protected]. E-mail bridge related questions to [email protected].

Road Design Manual 1.02.01D: Length & Type of Work: Updated the approval block example showcasing the new view without signature spaces. 1.02.01E: Project Signature and Plan Sign Off: New section which introduces the requirements for project signature and plan sign off. This change will be fully adopted with the April 2021 Letting. 1.02.01F: Consultant Identification: Updates the instructions for consultant identification and digital signatures to apply with project signature process (section moved from 1.02.01E to 1.02.01F). 2.04: Earthwork-General: Added the prismoidal method for electronically calculating excavation and embankment quantities. Also labeled the existing electronic method “End Area Volumes” and revised the term “Geopak” to a more general “design software”. 14.57: Plan Completion & OEC/Certification Acceptance: Added the Certification Acceptance File, Project Signature Sheet, and PoDI Stewardship & Oversight Action Plan form to the list of documents required in the ProjectWise Supporting Documents folder prior to submitting to the Specifications and Estimates Unit. Also, mentioned that the local FHWA Area Engineer will supply the PoDI Stewardship & Oversight Action Plan form on projects with PoDI oversight. 14.60.01, 14.60.02 & 14.60.03: References to Special Provision Exception Risk Analysis Form 2908 and Exception Risk Analysis Form 2912 have been moved from 14.60.02 to 14.60.03 as they are conditions of exceptions to the required items listed in 14.60.02. The last 4 paragraphs in 14.60.03 were divided and relocated to 14.60.01 and 14.60.02 as they did not pertain to “exceptions”. 14.60.01: Submission of Completed Plans: Added requirements for projects which are candidates for letting with five-week and six-week advertisements.

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Road & Bridge Design Publications

Monthly Update – December 2020

2

14.60.02: Requirements for Submission of Completed Plans: Added the Certification Acceptance File, Project Signature Sheet, and PoDI Stewardship & Oversight Action Plan form to the list of documents required prior to final submittal of plans.

Bridge Design Manual 2.03.02 & 3.01: Updated requirements for the necessity of a project/structure “Study”. 12.05.01: Added criteria for the use of Type 6 Modified (adhesive anchored) barriers on NHS routes. Updates to the MDOT Cell Library, Sample Plans, and other automated tools may be required in tandem with some of this month's updates. Until such updates can be made, it is the designer's/detailer's responsibility to manually incorporate any necessary revisions to notes and plan details to reflect these revisions.

MICHIGAN DESIGN MANUAL ROAD DESIGN

CHAPTER 1

INDEX

PLAN PREPARATION

1.01 DEVELOPMENT METHODS

1.01.01 References

1.01.02 General

1.01.03 Survey and Mapping Methods

1.02 PLAN SHEETS

1.02.01 Title Sheet A. Project Location B. Traffic Data C. Project Identification D. Length and Type of Work E. Project Signature and Plan Sign Off F. Consultant Identification

1.02.02 Project Information Sheet A. Utilities B. Notes Applying to Standard Plans C. Index

1.02.03 Vicinity Maps

1.02.04 Drainage Maps

1.02.05 Typical Cross Sections A. Stationing B. Scale C. Notes, Charts, Legends & Conventions D. Existing Typical Cross Section

1.02.06 Miscellaneous Details

1.02.07 Note Sheet

1.02.08 Miscellaneous Estimates

1.02.09 Legend Sheets

1.02.10 Survey Information Sheet

1.02.11 Alignment/ROW Sheets

PikkaWHighlight


CHAPTER 1

PLAN PREPARATION

1.01

DEVELOPMENT METHODS

1.01.01 (revised 11-28-2011)

References

A. Geometric Design Guides - Design Division

B. Guidelines for Plan Preparation – Design Division

C. Michigan Manual on Uniform Traffic Control Devices, Current Edition

D. Standard Plans and Special Details – Design Division

E. Standard Specifications for Construction, Current Edition

Existing plans for a recent project, similar in nature to the proposed project, are an excellent reference.

1.01.02 (revised 11-28-2011)

General

This chapter provides the information and details necessary to prepare a set of plans. The plans should contain all the information essential for bidding and constructing the project. Although innovation and creativity are encouraged in the preparation of plans, the importance of general uniformity must be emphasized. Plans should be adaptable to the diverse requirements of the Design Division and Construction Field Services Division. At the same time the plans should be a functional reference, familiar to the users. A general format should be followed by all Designers.

1.01.03 (revised 12-28-2020)

Survey and Mapping Methods

The choice between a ground survey, an aerial survey, a laser scanning survey (LiDAR), or a combination depends in part on the type and length of project, the information required, and the time schedule.

Some projects may not require a survey or may require only a minor pick up survey. Old plans are valuable sources of information on these projects.

Refer to Chapter 14, Procedures for Plan Preparation, for more information on surveys and mapping.

1.02

PLAN SHEETS

1.02.01 (revised 12-28-2020)

Title Sheet

The location map shown on the title sheet will generally be obtained from either county or city maps which are available in ProjectWise in the Reference Documents. For a particular project, a suitable map or section of one is chosen and incorporated on a standard title sheet cell. Because first impressions often sell the product, the title sheet should be neat in appearance and layout


1.02.01 (continued)

Title Sheet

D. Length and Type of Work

The length of the project, in hundredths of a mile, and the type of work should be shown in the bottom of the approval block.

Example:

E. Project Signature and Plan Sign Off

In supplement to the title sheet data, plan sign off must also be coordinated between all applicable parties involved both internally and with Consultant involvement. Project managers must utilize the latest version of the Project Signature sheet to implement digital signature approvals of plans and process.

The instructions tab of the Project Signature sheet overviews the steps required to implement digital signatures denoting completion of plans. Failure to collect the necessary signatures via the Project Signature sheet may move back the target letting, as the plans would not be considered complete.

Once all signatures are obtained, the final Project Signature sheet must be placed in Folder 6 in Projectwise along with the corresponding project plans (if applicable) and proposal.

1.02.01 (continued)

F. Consultant Identification

If plans are being prepared by a consulting firm (prime consultant), their company logo and professional engineer’s electronic signature (seal format) should be placed per the instructions tab of the digital project signature sheet. Sub-consultants must also have their logo on the plan sheets they are responsible for, along with their corresponding electronic signature seal and logo on their designated block of the project signature sheet.

If plans are being designed primarily by MDOT, but with some consultant inclusions, the consultant must list the applicable sheets they are responsible for, on the designated block of the project signature sheet as described in the instructions tab of the digital project signature sheet. They must also provide their corresponding company logo and electronic signature seal on the project signature sheet in the designated block area(s) for their applicable sheets.

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2.03.02 (revised 8-26-2019)

Drainage

Drainage is an important consideration in any highway construction project. Proposed drainage affects the establishment of the gradeline and the development of the typical cross section. Drainage is generally open drainage, using ditches and overland flow; closed drainage, using curb and gutter and enclosed sewers; or some combination of the two. For a complete discussion on drainage, refer to Chapter 4 – Drainage and the MDOT Drainage Manual.

A. Shoulder and Ditch Sections

Shoulder and ditch sections are the norm for open drainage projects. Storm water flows off the pavement, across the shoulder and fore slope, and into the ditch section. The ditch carries the water to a natural outlet. Ditch types include round bottom, valley, berm, toe of slope, “V” ditch and no ditch section. These are all shown on Standard Plan R-105-Series. The ditch section is often influenced by the location of the project, i.e., heavy snow areas would warrant a wider ditch section.

B. Curbed Sections

Curbed sections are most often used in urban situations. They may also be used when right-of-way is limited, where sidewalk or side paths may be present or planned, or in high fills where the curb is used for erosion control. Curbed sections generally drain to an enclosed sewer but sometimes outlet to a downspout or spillway.

Curbed sections are also used for roadside control and at intersections.

2.04 (revised 12-28-2020)

EARTHWORK - GENERAL

Earthwork is the term used to describe operations used in constructing the grading cross section for the proposed roadway. Earthwork has two main components, excavated (cut) and embankment (fill) material. Excavated materials, if suitable, can be moved and used to construct embankments. If on a project, excavated material is not sufficient to construct embankments, additional material or borrow must be brought in. Borrow material and sources are typically the responsibility of the contractor.

Granular materials, used for subbase and swamp backfill, must meet specifications and sources may not be readily available close to the project site. Topsoil is scarce in some areas and material for topsoil surface may have to be transported long distances to the project.

Excavation and embankment quantities are estimated electronically or manually as follows:

Electronically: Prismoidal Method

1. Use design software to model existing materials that are being removed and proposed design elements.

2. Use design software to extract prismoidal meshes between the existing ground digital terrain model (DTM) and the modeled elements.


2.04 (continued)

EARTHWORK – GENERAL

Electronically: End Area Volumes

1. Extract the existing ground cross sections from survey or photogrammetry Digital Terrain Models (DTM’s) at suitable intervals.

2. Use design software to compute the proposed (design) cross sections. Modify them if necessary in special areas.

3. Use design software to compute the areas of cut and fill at each section and the resulting volumes (using the average end area method.)

Manually: End Area Volumes

1. Obtain the existing cross section from a manual survey or by extracting them from a DTM using design software.

2. Plot the original ground and proposed cross sections manually using MicroStation, automated using design software, or a combination of both.

3. Use design software to calculate end areas at each cross section.

4. Using the average end area method, calculate the desired volumes of cut and fill, utilizing spreadsheet software.

5. Sum the cut volumes and the fill volumes for the entire project or the specific project locations.

Some areas require special care in plotting sections. For example, ramp intersections with mainline (gore areas) need to have match lines to avoid double estimating of the overlapping cuts or fills. Alternately, export the mainline proposed cross section to the DTM, and create a composite of the proposed mainline and existing ground. Then, extract cross sections from the composite DTM surface, therefore taking into account the proposed mainline roadway.

2.04.01 (revised 4-22-2019)

Excavation

Excavation can be in other forms than regular roadway excavation. Following is a brief description of some of these special or project specific items.

A. Station Grading

This item is often used on projects where normal earthwork items are not practical, or when recommended by Region Construction.

Station grading is typically paid for by feet and requires a special provision. The Designer should include an estimate of excavation and embankment requirements for the Contractor's information for bidding purposes.

B. Trenching

This item is used when a uniform section is to be excavated such as for a widening or reconstructing a shoulder. The excavation is typically a uniform width and depth.

Trenching is a standard specification pay item and because of uniformity an excavation quantity does not need to be estimated.


14.57 (revised 12-28-2020)

PLAN COMPLETION & OEC/CERTIFICATION ACCEPTANCE(PPD Milestone 380M) (PPD Milestone 391M)

The Plan Completion date indicates 100% completion of the plans, proposal and supporting documents.

As part of the stewardship agreement with the FHWA, MDOT developed a procedure involving a system of checks/reviews to verify all requirements of the agreement are met. The Department also made the decision to use the majority of the process (completion of the Certification Acceptance form) on all projects (Federal and M funded), including those classified FHWA Oversight. The verification is accomplished by completing the Certification Acceptance form. The form includes reviews (with confirmation by e-signatures) by several divisions and sections within the Bureau of Highways. Once the form is complete in the ProjectWise Supporting Documents folder, it is submitted to the Specifications and Estimates Unit at final turn-in. The required signatures (or initials) are listed below:

Bridge Design Unit (if applicable) Project Manager/Cost and Scheduling

Engineer / Design Engineer / Consultants Quality Assurance Engineer Specifications and Estimates Engineer Utility Coordination and Permits Governmental Coordination and

Engineering Office of Rail Drainage Engineer Force Account Work (if applicable) Geometric Design Engineer Traffic Signs and Delineation Traffic Signals Region/TSC Traffic and Safety Resident/Delivery Engineer FHWA Area Engineer (if applicable)

14.57 (continued)

The following documentation should be in the applicable ProjectWise location prior to final submittal to the Specifications and Estimate Unit.

Environmental Classification (Form 1775) Special Design Considerations Memo

Mitigation measures required in the environmental document (EIS, FONSI)

Permits Copies of Scope Verification and The Plan

Review Meeting minutes. Design Exceptions / Variances Waiver-Planting Wildflower Expenditures Pavement Selection Review Committee

Approval Letter. Approved Unique Special Provisions Signed / Completed

Certification Acceptance File Signed / Completed

Project Signature Sheet

On FHWA Oversight projects, in addition to the Certification Acceptance File being complete, the corresponding signed PoDI Stewardship & Oversight Action Plan form must also be obtained and placed in the ProjectWise Supporting Documents folder prior to submitting the final plan/proposal submittal to the Specifications and Estimates Unit.

Note – the applicable FHWA Area Engineer will supply the PoDI Stewardship & Oversight Action Plan form on applicable projects with PoDI oversight.


14.60

SUBMISSION OF COMPLETED PLANS

14.60.01 (revised 12-28-2020)

General

The final plan/proposal package should be submitted to the Specifications and Estimates Unit on or before the date listed in the calendar year’s schedule of Letting and Board Dates. This date should not be confused with “Plan Completion Date.” Plan completion date occurs after the FPC Meeting and is the date when 100% of the plans are completed. See Section 14.54 for task timelines. A copy of the letting schedule is located on the Plan Development Services intranet website.

The Supervisor of the Specifications and Estimates Unit will determine which projects are candidates for letting with 3 or 4 week advertisements. Projects proposed for 3 week advertisements must have the approval of the Engineer of Design (except for Capital Preventive Maintenance, Non-Freeway Resurfacing Program and Pavement Marking projects). Projects proposed for a 6 week advertisement require notification with the Supervisor of the Specifications and Estimates Unit, and must be submitted one week prior to normal turn in. All other projects will utilize a 5 week advertisement period.

Once a project is submitted to the Specifications and Estimates Unit the Project Manager can check ProjectWise for the status of a project.

Upon receipt of the plan/proposal package for processing, the Specifications and Estimates Unit may ask to review the project with the Design Unit in order to gain an insight into the type of work involved to determine if any additional special provisions and/or supplemental specifications are required.

14.60.02 (revised 12-28-2020)

Requirements

Advertisement cannot occur until all projects within a contract have funding obligation. Funding obligation requests cannot occur without the following:

All change requests in JobNet are approved

Environmental Certification or Classification in JobNet is up to date

ROW Certification or Conditional Certification is approved

S/TIP CON phase is approved – if a JobNet change request increases the project budget significantly, a previously approved S/TIP phase may become pending, and will need to be approved again before obligation can occur

FHWA has signed off on the CA Form, if necessary

Expedited or other projects requiring special attention should be brought to the attention of the Supervisor of the Unit prior to submittal. This includes projects without all the material described above.


14.60.02 (continued)

All plan/proposal package and final supporting document submittals should include at least the following, in addition to the plans:

1. Title Sheet 2. Signed / Completed

Project Signature Sheet 3. Milestone Checklist 4. Proposal level cost summary (AP

Preconstruction) 5. Unique special provisions (approved for

project use) including maintaining traffic 6. Frequently used supplemental

specifications and special provisions (package and checklist)

7. Required permits 8. Utility Relocation Status Report (Form

2286) 9. Utility Charge Estimate (Form 0223) - for

bridge projects 10. ROW Certification for Advertising (Form

0725I or Form 0725N) 11. Coordination clauses 12. Signed / Completed

Certification Acceptance File 13. Notices to Bidder 14. Progress schedule with any

incentive/disincentive clauses 15. Project Cost Estimating Checklist (Form

0268) 16. Exception with a memorandum signed by

the Region Engineer acknowledging the risks and a completed Exception Risk Analysis (Form 2912).

17. Structure Lump Sum Items Worksheet (Form 2911) if applicable

18. Signed / Completed PoDI Stewardship & Oversight Action Plan form (if applicable)

The Project Manager must get approval from the Supervisor of the Specifications and Estimates Unit prior to submitting a final package without ALL of the above items.

14.60.03 (revised 12-28-2020)

Exceptions

There are some exceptions to the above minimum requirements for submittal of plan/proposal packages to the Specifications and Estimates Section. Exceptions are permitted in the following areas:

1. Permits 2. ROW Certification on non-federally funded

projects 3. Trunkline agreements with local agencies 4. Unique Special Provisions (not desirable

and must have supporting signed/approved Special Provision Exception Risk Analysis Form 2908, also see Section 14.58)

In order to submit a package to the Specifications and Estimates unit with an allowable exception for items 1-3 above, the following steps must be followed:

Perform a risk analysis for each appropriate exception.

Invite appropriate experts for each exception to the FPC Meeting.

Send the Exception Risk Analysis (Form 2912) along with the other required documents to the FPC participants (two weeks prior to the meeting).

If the participants at the FPC meeting agree with your request for an exception, have them initial the Exception Risk Analysis (Form 2912).

If the participants disagree with the need for an exception, they must attach written comments to the Exception Risk Analysis (Form 2912).

The Exception Risk Analysis (Form 2912) along with any comments should be forwarded to the Region Engineer for their signature. The form is placed in the Supporting Documents folder in ProjectWise when the plan/proposal package is submitted to the Specifications and Estimates unit.

If the exception is a permit, include a Notice to Bidders that a permit is required, the projected date of permit approval and identify any restrictive conditions.


14.60.03 (continued)

Specifications and Estimates will not submit the package for advertisement without an approved exception.

14.60.04 (revised 12-17-2018)

QA/QC Review

It is the responsibility of the Project Manager to perform a QA/QC review of the entire plan/proposal package prior to submittal to the Specifications and Estimates Unit. As a minimum, in addition to those items listed under Section 14.60.02, the following items must be correct:

Quantities and pay items on plan sheets must match those in AP Preconstruction.

All Unique Special Provisions with a pay item must have a matching pay item in the plans and in AP Preconstruction.

All 7000 numbers in AP Preconstruction must have a Unique Special Provision in the proposal with matching units.

Any Frequently Used Special Provision with a pay item must have a matching pay item in the plans and in AP Preconstruction.

All Frequently Used Special Provisions and Specifications include in the package are the latest version.

AP Preconstruction files must be complete and correct.

All references to standard plans and special details are the latest version.

14.60.05 (revised 12-17-2018)

AASHTOWare Project (AP)Preconstruction Files

Listed below are some directions/reminders concerning AP Preconstruction files:

Project should be identified as J.N. with A (######A)

Proposal Contract ID should be “C.S.-J.N.”, with no extra spaces or characters, job number does not have an “A” or any other suffix

If more than one job is packaged together, the Contract ID number is based on the predominate C.S. in the lowest numerical job number of those being packaged together.

County number is filled in Spec year is correct, both at proposal and

project level Section and Line number have been run Primary Region has been filled in Section List indicate “Road Work” or

“Bridge Work” Long description entered using standard

wording Number of plan sheets filled in Contract type is filled in All Pre-established prices have been

marked Funding distribution adds to 100% Each Lump Sum item adds to a combined

total of 1.00 Administrative unit has been filled in Beginning and Ending termini have been

filled in CE percentage is correct Control group changed to ”DS” in the

Project and Proposal level The unit bid requirement code (on Items

tab) is fixed, NOT LOCKED, for all dollar items

Project start date and completion date filled in

The supplemental description for all 7000 items is the same as the pay item in the Special Provision.

MICHIGAN DESIGN MANUAL BRIDGE DESIGN

2.03

PLAN PREPARATION STEPS

Preparation of Plans for structures follows three steps. The first step is the development of a Study. The second step is the preparation of Preliminary Plans, and the third step is the development of Final Plans and accompanying specifications. A detailed discussion of each of these steps is covered in Chapters 3 and 4 of this volume.

2.03.01

FHWA Oversight / MDOT Oversight (12-5-2005) (7-23-2018)

Section 2.03.01 is currently under review to adopt revised oversight definitions and procedures. Oversight responsibility for individual project elements is determined exclusively for each project and mutually agreed on by MDOT and FHWA. Any questions regarding the status of projects should be directed to the appropriate FHWA Area Engineer

2.03.02

Study

The study establishes the general design features such as the type of structure, cross-section, waterway opening (size), span arrangement, and alignment. For waterway crossings, hydraulic and scour analyses to determine the size of opening and the impact of scour on the design of the foundation must be part of the study. Studies of federally financed projects for new bridge construction and major rehabilitation must be approved by the FHWA before proceeding with preliminary plan preparation. Normally, the structure proposed should be the most cost effective of those considered based on a life cycle cost analysis. Studies are normally not required for rehabilitation projects. For additional information see section 3.01 and 4.01.(11-19-99) (12-28-2020)


3.01

STUDY (12-17-2018)

The first plan of a structure is a feasibility study showing the basic design concept and the topography in the immediate structure area. This study is prepared on a reproduction of the General Plan of Site Sheet.

The study is submitted by the Unit Leader to the Chief Structure Design Engineer for approval. FHWA Oversight projects that are federally financed must also be reviewed by the FHWA. For definition/clarification of oversight see Chapter 2. These approvals must be obtained before Preliminary Plans can be started. The study, as approved, then becomes a permanent record and is to be kept by the Unit until the construction of the bridge is completed. (8-6-92)

A study must be completed for all new construction and reconstruction projects. Generally, structure studies are not required for deck replacements on slab and beam bridges unless the deck replacement involves widening requiring more than one beam line, the vertical alignment or horizontal alignment changes significantly, or the project has other unique characteristics that would benefit from the structure study process. Structure studies should be completed for deck replacements on complex bridges. (12-28-2020)

For rehabilitation, e.g., railing replacement and/or deck overlay projects see Chapter 4.

3.01 (continued)

Where a project involves earth excavation, the Project Manager sends a project description and requests a list of potentially contaminated sites identified by the Environmental Assessment Unit, Project Coordination Unit of the Project Planning Division and the Region Resource Specialist. The Project Manager/Cost and Scheduling Engineer will locate identified potential sites of contamination on the preliminary plans. If earth excavation will impact a potential contaminated site, the Project Manager/Cost and Scheduling Engineer will request further investigation of the site to be done by MDOT Geotechnical Services Section, Bureau of Bridges and Structures. Geotechnical Services Section will provide information on the type and extent of the contamination, appropriate pay items and quantities for the Plans and Specifications. For more detailed information see Section 14.13 of the Road Design Manual. (5-1-2000)

Before starting and during the preparation of the study plans, the following information relevant to the design of the bridge should be considered:

A. Engineering Report. (Including Environmental Impact Statement if applicable.) (8-20-99)

B. Topography.

C. Traffic data - If traffic data is unavailable at this time, it should be requested from Region/TSC Traffic and Safety personnel.


12.05

RAILING UPGRADING (11-25-2019)

Bridge railings shall be upgraded where the existing facility is found to be inadequate, either because of crash experience or because it is not a current MDOT approved railing. Upgrading will be scheduled according to the following guidelines:

A. Railings shall be upgraded at any location where a revised railing can be expected to reduce the severity of crashes.

B. Railings shall be upgraded at any location within safety upgrading projects.

C. Railings shall be upgraded when bridge reconstruction of any nature is planned.

D. Railings shall be upgraded where pedestrian screening is added to a bridge.

The decision to retain, retrofit, or replace existing railing depends on the type and condition of the railing and the curb or sidewalk treatment.

Where replacement is required, the proposed railing must be a current MDOT approved railing. (5-1-2000)

12.05.01

Approved MDOT Railings(5-1-2000) (11-25-2019) (9-28-2020)

Current MDOT approved railings are:

A. Bridge Barrier Railing, Type 6 (B-29-Series)

B. Bridge Barrier Railing, Type 7 (B-28-Series)

C. Bridge Railing, Aesthetic Parapet Tube (B-25-Series)

D. Bridge Railing, 2 Tube (B-21-Series)

E. Bridge Railing, Thrie Beam Retrofit (B-22&23-Series)

F. Bridge Railing, 4 Tube (9-2-2003) (B-26-Series)

G. Bridge Railing, 3 Tube With Pickets (B-27-Series)

H. Bridge Railing, Concrete Block Retrofit (B-50-Series)

I. Bridge Barrier Railing, Type 6, Modified * (B-29-Series & Bridge Design Guides)

* Type 6 modified (adhesive anchored) railing must only be used for non-NHS routes. Approval to use adhesive anchored barriers on NHS routes must be requested from the Chief Structure Design Engineer if the deck overhang cannot be replaced AND the superstructure has appreciable life left (good or fair condition upon completion of the project). Other criteria/circumstances that make replacement of the barrier and necessary portions of the deck not technically feasible may be considered.

(12-28-2020)

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