Chapter 8: Grade SeparationsAnchor: #i1000689
Section 1: OverviewAnchor: #i1000694
This chapter covers agreements between TxDOT and railroad companies involving grade separation construction and reconstruction projects.Anchor: #i1000704
Project Process Overview
A grade separation construction or reconstruction project typically proceeds as follows:
- Project is scheduled and funded. (See Section 2 of this chapter for information on programs and financing.)
- The district or consultant (or both), with support from
the Design Division (DES), designs the proposed structure and prepares
the preliminary plan layout (including plan-profile) to be used in
the agreement as Exhibit A. (See Section 3 of this chapter for
details on content and preparation of Exhibit A.) The district
then submits the layout to DES.
NOTE: This submission should occur 12 months prior to the scheduled contract letting date to allow the railroad company sufficient time to review the project, address any revisions, prepare force account estimates, and sign the agreement. For railroad underpasses, design calculations should be submitted as soon as preliminary details are available. Also any details of required shoring must be accompanied by design calculations.
- DES reviews the plan layout sheets, makes prints, and
submits them to:
- Federal Highway Administration (FHWA), if federal funds are involved
- railroad company or companies involved, along with a request to submit the number of regular train and switching movements at the grade separation location (This information is used to prepare Addendum I to Special Provision to Item 007. Addendum I is used by TxDOT’s contractor to obtain Railroad Protective Liability Insurance for work performed on railroad right-of-way.)
- Traffic Operations Division (TRF), along with a request to develop an agreement with the railroad.
To reduce the time needed for approval, the most current revisions should be included. (See Section 4 of this chapter for details.)
- The FHWA, the railroad company, and TRF forward comments on and approval of the plan layout sheets to DES. (See Section 4 of this chapter for details.)
- DES coordinates the resolution of the comments. (See
Section 4 of this chapter for details.)
NOTE: Revisions that occur after approval of the plan layout sheets increase the time needed to obtain a signed agreement from the railroad.
NOTE: Any revisions made to the plan layouts after the district submits them to DES should immediately be sent to DES for coordination with the railroad.
- DES and TRF coordinate the plan layout and plan-profile modifications, as necessary. The revised and approved plan layout sheets become Exhibit A of the agreement. (See Section 3 of this chapter for details.)
- TRF prepares the agreement and negotiates with the railroad company or companies involved. (See Section 4 of this chapter for details.)
- DES, the district, or a consultant develops bridge detail plans after all comments and changes to the geometric features of the overpass or underpass have been resolved.
- The district prepares a complete PS&E (plans, specifications, and estimates) package and forwards it to DES for review prior to contract letting. (See Section 3 of this chapter for details.)
- DES prepares and assembles the approved plans, specifications, and estimates (PS&E) for the portion of the project involving the railroad (this becomes Exhibit B of the agreement). DES also prepares an Addendum I to Special Provision to Item 007, which is used by the TxDOT contractor to obtain railroad protective liability insurance. (See Section 3 of this chapter for details.)
- TRF transmits the Exhibit B approved by DES to the railroad company or companies for their approval. (See Section 5 of this chapter for details.)
- The railroad approves the Exhibit B and returns the signed title sheet to TRF. (See Section 5 of this chapter for details.)
- The district issues the work order to the railroad shortly after the project is let to contract. The district conducts all pre-construction meetings, inspects the work, and issues the completion letter to the railroad when the project is complete. (See Section 6 of this chapter for details.)