Section 5: Railroad Grade Separation Program
Anchor: #i1009493Overview
The Railroad Grade Separation (RGS) Program addresses the construction of new grade separation structures at existing at-grade highway-railroad crossings and the rehabilitation or replacement of deficient highway underpasses of railroads on the state highway system. The eligible state highway system routes must be of a classification greater than local road or rural minor collector on the functional classification scale; i.e., they must be classified as federal-aid highways. Title 23 of the CFR Part 646 Subpart B – Railroad-Highway Projects provides federal policy and guidance on these types of projects.Selected and prioritized highway-railroad grade separation projects are in some instances authorized in funding Category 6 RGS of the yearly Unified Transportation Program (UTP) under the CONSTRUCT level of authorization. Category 6 RGS funding is targeted for each of the following:
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- new grade separation structures Anchor: #VJRSRENR
- remedy of deficient railroad underpasses
Candidate projects for construction of new grade separation structures are prioritized using a cost-benefit index, while projects for railroad underpass replacement/rehabilitation are prioritized using a priority rating. The cost-benefit index and priority rating are summarized in the Statewide Prioritization and Programming section and described in detail in Chapter 10 of the Rail-Highway Operations Manual.
Anchor: #i1009861Eligibility Requirements
Funding for Category 6 RGS in these projects should be limited to the actual structure and other work necessary to make the structure serviceable and consistent with good design. This limits Category 6 RGS-funded approach roadway work to that which is sufficient to transition the gradeline of the structure to an attainable touchdown with the existing or new approaching roadway that is at or near level grade. Roadway and other work that is outside these limitations should be funded from other categories.
These limitations should particularly control when the new or replacement structure will be constructed on a new alignment or at a new location.
Except in extraordinary situations, the existing at-grade highway-railroad crossing should be eliminated.
Anchor: #i1009994Statewide Prioritization and Programming
New Highway-Railroad Grade Separation Projects
The cost-benefit index used in prioritizing new highway-railroad grade separation projects is the estimated cost in millions of dollars that would be saved in highway user cost over a 50-year design life of the new grade separation structure constructed at the existing highway-railroad crossing. The higher the estimated user cost, the higher the priority. The estimated user cost includes costs due to casualties (fatalities and injuries) and personnel and traffic equipment delay.
Factors used in calculating a cost-benefit index are as follows:
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- Average daily traffic Anchor: #KGGXEBNL
- Number of train movements Anchor: #ORHNLVFU
- Number of highway fatalities, injuries, and property damage only crashes Anchor: #LKXYNDMD
- Period (range) in years for which casualty data are available Anchor: #PGQGKEMU
- Estimated yearly costs for personnel and traffic equipment delays due to waiting for trains to pass
The data described for cost-benefit index calculation are compiled with data from the National Safety Council, CST, the Internal Revenue Service, and the Equipment Watch Rental Rate Blue Book.
When a new highway-railroad grade separation project eliminates an existing highway-railroad crossing with an active warning device (or is ordered by a state regulatory agency to install one), the respective railroad company is federally required to provide 5% of the project cost. See 23 CFR 646.210 for more detailed information.
Railroad Underpass Replacement/Rehabilitation Projects
Projects for railroad underpass replacement/rehabilitation are prioritized using a priority rating or score on a numerical scale of 0 through 100. The higher the number, the less sufficient the structure for underpassing highway traffic, and thus, the higher the priority for replacement/rehabilitation.
The attributes and relative weights used in calculating a priority rating score are as follows:
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- Vertical clearance - 50% Anchor: #CIEXDIFL
- Percent trucks - 30% Anchor: #FQUPNRMQ
- Horizontal clearance - 15% Anchor: #UKXXHMNJ
- Average daily traffic - 5%
This rating calculation uses the Bridge Inspection Database appraisal ratings (0 through 9) for vertical and horizontal clearance. The Bridge Inspection Database provides percent trucks and average daily traffic items.
Program Time |
Month |
Time Frame |
Action Items |
---|---|---|---|
List Development |
December |
1 month |
BRG develops lists of all eligible RGS projects. |
Program Call |
April |
1 month |
Districts select new candidates and update current estimates and lettings. |
Project Selection |
May |
1 month |
BRG/RRD-RSS develops list of District candidate projects in order of prioritization. |
Selection Comments and Special Considerations |
June |
1 month |
Districts comment on selections and propose special considerations. |
Program Call Finalized |
July |
1 month |
BRG prepares final call list with special considerations. |
Final List Sent to FIN |
July |
1 month |
BRG sends final RGS list to FIN. |
DCIS Updates |
August |
1 month |
Districts submit DCIS changes and build new CSJs. |
Develop PS&E |
Submit package 3 months pre-letting |
12-24 months |
District begins survey, permitting, and layout development. BRG review required. |
Bridge Plans |
Begin design no later than 6 months pre-letting |
Minimum 3 months |
*Bridge plans developed by District, Consultant, or BRG. BRG review required. |
* NOTE: Per the Rail-Highway Operations Manual, Chapter 2, 12-18 months are needed to get an agreement for an overpass from the time RRD-RSS receives the Exhibit A. 24+ months is needed for an underpass structure.
The main steps involved in the agreement process are:
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- Execution of preliminary engineering agreement (TxDOT + RR) Anchor: #KNTSNQJF
- Design approval by BRG + Rail Division Rail Safety Section (RRD-RSS). Anchor: #CRLSBHPG
- Design review by RR or RR Company’s consultant. Anchor: #FJSDAYSX
- Design approval by RR for both plans and theoretical 5% cost calculations. Anchor: #GFIYOWXC
- Estimates from RR for any track, flagging, and grade crossing work. Anchor: #TAXJMWDK
- Agreement review and signatures by RRs to RRD-RSS. Anchor: #TPOBQWEE
- Ex B process occurs after the agreement has been signed (100% plan approval).
Category 6 Developmental Authority (6DA) can be utilized to perform a feasibility study to determine the effects of changing a highway-railroad underpass structure to a highway-railroad overpass structure. Overpass structures are more desirable to the Department and the railroads. Contact your Bridge Division project manager for more information.