Rail policy

Reciprocal Switching: The STB Rule Most Shippers Aren't Using

Published June 3, 2026

Reciprocal switching is when one railroad uses another railroad's track to serve a shipper that doesn't physically sit on its line. The Surface Transportation Board (STB) issued a final rule on it in April 2024 after 13 years of rulemaking. Most shippers will never petition for one. But switching charges show up on rail bills every day, and roughly 10% are billed without proper authority. Your first audit with Eller Audit is free.

What reciprocal switching is — a 40-year debate, in 200 words

US rail freight runs on two parallel networks — the line-haul Class I carriers (BNSF, Union Pacific, CSX, Norfolk Southern, CPKC, and Canadian National) and the connecting short-line and switching carriers that move cars the last few miles to a shipper's plant. Most large industrial shippers physically sit on exactly one Class I's track. That shipper is “captive” — the only rate they can negotiate is the rate the carrier on their siding offers.

Reciprocal switching is the regulatory escape valve. Where two railroads' lines meet at a junction, statute (49 USC 11102(c)) allows the STB to order Railroad A to deliver a car to Railroad B at the junction so Railroad B can move it to a shipper that doesn't physically sit on B's line. Railroad A gets a switching fee; Railroad B and the shipper get access to a competitive rate. The Government Accountability Office (GAO) has flagged rail competition gaps multiple times over the past 20 years as a reason captive-shipper rates run materially higher than competitive lanes.

In practice, the 1985 rule that governed reciprocal switching for nearly four decades produced essentially zero granted petitions. That is the problem the 2024 rule was written to solve.

The 2024 STB final rule (Ex Parte 711) — what changed

In April 2024, after roughly 13 years of rulemaking under Ex Parte (EP) docket 711, the STB issued a final rule on reciprocal switching for inadequate service. The rule's central move: instead of asking a shipper to prove that competition would benefit the rail network — the old 1985 standard, which no petitioner ever met — the new rule lets a shipper petition based on the line-haul carrier's service performance against published, measurable thresholds.

The standardized triggers in the final rule cover sustained service failures on three metrics: on-time arrival performance, transit-time variability, and first-mile/last-mile reliability. A shipper that can document the line-haul carrier's performance falling below the rule's thresholds over a defined measurement window can file a petition for a reciprocal switching order without the old "competitive access" showing.

The carrier coalition (led by the Association of American Railroads [AAR]) opposed the rule. Shipper coalitions like the National Industrial Transportation League (NITL) and the American Chemistry Council's rail group supported it. Final form is materially narrower than what shippers pushed for, but it is the first workable reciprocal-switching petition path since 1985.

Most shippers will still never file a petition. The data burden is meaningful, the legal cost is meaningful, and the relationship cost with the line-haul carrier is meaningful. That is fine. The rule is most useful as a leverage point in contract negotiation — and the audit-relevant point is that the act of physically switching cars between railroads at junctions has been going on for a century, and the bills for those switches are where the day-to-day money sits.

How reciprocal switching shows up on your rail bill

Reciprocal switching, intra-plant switching, and interchange charges typically appear on a rail invoice or waybill as one of three line-item labels: SWITCH CHG, INTERCHANGE, or RECIPROCAL SWITCH. The dollar amount per move runs $50 to $250 depending on the controlling tariff — small per car, but multiplied across thousands of cars per year on any industrial-volume program.

The structure of a typical switch line on a Class I bill:

• Switch type code — intra-plant, intra-terminal, interchange, or reciprocal switch. Each has a different tariff basis and a different authority requirement.
• Tariff cite — the published switching tariff (e.g., UP 6004-series, BNSF 4022-series, CSXT 8100-series) and the item number. A line with no tariff cite is the first red flag in any switching dispute.
• Origin and destination switching point — the specific track or junction where the switch occurred. Should match what the waybill says.
• Authority reference — the equipment authority record (AAR Circular OT-5 for equipment-related moves) or the contractual switching authority. Frequently absent.
• Per-move charge — the dollar amount itself, billed at the tariff rate for the type and distance of move.

On a typical industrial-shipper program, switching charges run about 8 to 12 percent of total rail accessorial spend. Audit experience across that volume: roughly 10 percent of switching lines are billed without one or more of the authority elements above. That is the recoverable share.

Worked example: chemical shipper, $105K–$215K recoverable switching per year

A US specialty chemicals shipper moves roughly 4,200 cars per year across BNSF and Union Pacific (UP) on a multi-plant program. Total switching, interchange, and accessorial billing runs about $2.4M per year — switching alone is the largest line within that bucket.

Authority and documentation exposure: across the $2.4M of annual switching + accessorial billing, audit-side review catches authority or documentation failures on roughly 8 to 12 percent of lines. That is $190K to $290K of disputable switching charges per year. Recovery rate on disputes that go through the carrier's standard claims portal: 55 to 75 percent, depending on how cleanly the tariff cite, the AAR OT-5 record, and the contract align. That works out to $105K to $215K recovered per year on this single line category.

The recovery is not glamorous. It is line-by-line, tariff-cite-by- tariff-cite, dispute-by-dispute. But the work is consistent, and on multi-plant programs the cumulative annual recovery exceeds the cost of the audit by a wide margin. For Fortune 500 enterprise rail shippers with $80M+ annual rail programs, recoverable switching findings routinely run $1M to $3M per year.

Where switching bills go wrong — four failure modes

After several years of reviewing rail switching bills against tariffs and contracts, the same four failure modes account for most of the recoverable overcharges:

1. Reciprocal switch billed with no AAR Circular OT-5 equipment authority. AAR Circular OT-5 is the equipment authorization record — the document that says a specific car is approved to move in a specific service. When a reciprocal switch involves a car that was not properly OT-5-authorized for the switching service, the line-haul carrier still routinely bills the switch. The bill is disputable on the equipment-authority record alone.

2. Interchange tariff cited that doesn't apply. Each Class I publishes interchange tariffs that govern car movements at specific junctions, between specific carriers, for specific commodities. Bills routinely cite the wrong tariff — an old version, a different junction, or a tariff that doesn't cover the commodity moved. The most common rail dispute losses we see are not on the underlying facts but on the citation. The wrong tariff cite kills an otherwise valid dispute, and the wrong tariff cite on the carrier's bill kills the bill.

3. Bunching events double-billed across switching and demurrage. When multiple cars arrive at a switching point outside the planned window (a "bunching" event), the carrier may bill both the switching charge for re-spotting the cars and demurrage for the time spent waiting to be re-spotted. The controlling tariff usually excludes one or the other in a bunching scenario. AP almost never catches the overlap.

4. Intra-plant switching billed for moves the shipper performed itself. Some industrial sites operate their own in-plant switching with their own locomotives. The line-haul carrier's tariff may still default to billing an intra-plant switch fee at the gate, regardless of who actually moved the car inside the plant. The contract should exclude shipper-performed intra-plant moves explicitly. When it doesn't, the bill defaults to the tariff and the shipper pays for moves they performed themselves.

What your rail contract should say about switching — 3 clauses

After reviewing several hundred rail contracts, three clause patterns do the work on switching disputes. They are the lines we read first when a switch charge looks wrong.

Switching authority requirement. “All switching charges billed under this Agreement shall reference the controlling tariff item, the originating switching authority (including any AAR Circular OT-5 equipment record where applicable), and the originating party that requested the switch. Charges submitted without one or more of the foregoing shall be void and not payable.” Without this, the carrier can bill any switch and force the shipper to prove a negative.

Interchange tariff lock. “The controlling interchange tariff for shipments tendered under this Agreement shall be [Carrier] Tariff [Number], in effect as of the date the shipment is tendered. Subsequent revisions to the tariff shall not apply to shipments tendered prior to the effective date of the revision unless the parties agree in writing.” This is the clause that prevents quarterly-revision back-billing.

Intra-plant switch exclusion. “Intra-plant switching performed by Shipper's own equipment within Shipper's plant boundary as defined in Exhibit A shall not be billable by Carrier. Carrier-performed intra-plant switching shall be billable only when Carrier's locomotive and crew physically perform the move.” Without this, the default is the tariff, and the tariff frequently bills the switch regardless of who performed it.

What we can't tell from the bill alone — the 3 missing documents

Rail switching bills are the most evidence-thin line item we audit. A typical SWITCH CHG line on a Class I bill shows a type code, a dollar amount, and sometimes a tariff cite. What it almost never shows is the originating authority: who ordered the switch, under what tariff item, with what equipment record. The dispute requires three documents the bill omits.

First, the controlling switching tariff in the version effective on the date the switch was performed. Tariffs are revised quarterly on most Class Is, and a bill issued in week 1 of a new quarter may have been computed against the old tariff or the new tariff depending on when the carrier's billing system caught the revision. Without the specific tariff version, the math behind the bill cannot be verified.

Second, the controlling contract — including any side letters or amendments that override the tariff for switching. Most rail contracts override line-haul rate and sometimes fuel surcharge, and leave switching to the tariff. When the contract does override switching, the contract language controls and the tariff is silent. A bill that looks right against the tariff and wrong against the contract is wrong.

Third, the AAR Circular OT-5 equipment authority record for any switch that involves a car-specific authorization. Most reciprocal switching disputes that hinge on equipment turn on whether the OT-5 record actually authorized the move that was billed. Without the record, the bill is unverifiable in either direction.

How Eller Audit handles switching charges

We maintain a current switching-tariff library for every Class I railroad and the major short-line and regional carriers, paired with the controlling contract for each shipper. Every switching line on every waybill is parsed against both. Lines that lack a tariff cite, lines that cite a tariff inconsistent with the move, lines that bill intra-plant switching where the contract excludes it, and lines that double up with demurrage on a bunching event get flagged for human review. When the line is disputable, we draft the dispute citing the tariff version, the contract language, and where relevant the AAR OT-5 record, then file through the carrier's claims portal under 49 USC 11706.

The engagement is performance-based: you pay a share of what we recover, and nothing on the lines that hold up. Most switching disputes resolve inside the carrier's 60 to 90 day claims window. For shippers who want to evaluate whether a reciprocal switching petition under the 2024 STB rule is worth pursuing, we can produce the service-performance data set the rule requires — but that is a separate engagement from the line-by-line audit work, and most of the recovery is on the audit side, not the petition side.

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