Services
Document a loss
Support a claim
For carriers and employers
Service areas
Middle Tennessee
- Nashville
- Clarksville
- Murfreesboro
- Franklin
- Hendersonville
- Smyrna
- Spring Hill
- Gallatin
- Lebanon
- Columbia
- Brentwood
- Mount Juliet
- La Vergne
- Cookeville
East Tennessee
West Tennessee
Lane-Change and Sideswipe Accident Documentation
A sideswipe leaves long, shallow damage down the side of two vehicles and a dispute over who left their lane. DCD documents the direction of the scrape, the lane markings and the merge or weave area for adjusters, attorneys, motor carriers and drivers.
- Coverage
- 95 of 95 counties
- Dispatch
- 24 / 7 / 365
- Metro response
- Under 60 min avg.
- Statewide
- 4-hour guarantee
What this service covers
Lane-change collisions involve two vehicles travelling the same direction in adjacent lanes. One moves sideways, or both do, and their sides meet. There is seldom a clear point of impact on the road, tire marks are uncommon and both vehicles frequently continue some distance before stopping. Each driver typically says they were established in their lane and the other came over. With little roadway evidence, the vehicles carry most of the record.
A DCD investigator photographs the full length of contact on each vehicle and records the direction in which scratches and transferred material were dragged. At the scene, lane widths, line types, merge tapers, lane drops and signs are documented along the stretch where the drivers place the collision. For large trucks, mirror coverage beside the cab and trailer is recorded. The documentation is neutral on which vehicle moved.
Same-direction disputes we document
- Two drivers on a multi-lane road each say the other drifted or merged into their lane and the crash report lists both versions.
- A passenger car was struck by a tractor-trailer changing lanes and the motor carrier wants mirror coverage beside the unit documented.
- The collision occurred where two lanes merge into one or at an on-ramp, and the taper length and signs are at issue.
- Dual left-turn lanes were in use and one vehicle swung wide into the adjacent turning path during the turn.
- One vehicle has been repaired and the other has not, and the remaining scrape evidence needs to be preserved.
What is recorded on the vehicles and the road
- Scrape direction and length
- The start, end and direction of scratches along each vehicle's side, shown in close-up so the drag of paint and metal can be read.
- First contact point
- The forward-most and rear-most contact on each vehicle, such as a front wheel, mirror or rear quarter, indicating which vehicle was ahead at contact.
- Wheel, tire and lug marks
- Circular scuffing from rotating tires, sidewall abrasion and lug nut scoring on body panels, which occur when a wheel contacts the other vehicle.
- Mirror damage and fold direction
- Whether each side mirror was folded forward or rearward, broken or missing, and the height at which it struck the other vehicle.
- Lane lines, widths and tapers
- Lane widths, solid and broken line segments, merge taper length, lane-ends and merge signs and their distance from the reported collision area.
- Truck side-mirror coverage
- For commercial units, the view in flat and convex mirrors from the driver's seat and the zone alongside where a car is not visible.
From request to delivered record
- RequestCall dispatch or submit the request form with the location, loss type and urgency.
- DeployDispatch assigns the nearest available licensed field investigator through the statewide network.
- DocumentPhotographs, video, measurements and factual notes are captured once the scene is safe to work.
- PreserveFiles are timestamped, organized and kept in their original form with a record of who captured them.
- ReportThe package is delivered securely to the requesting party, typically the same day.
Reading the side of the vehicle
Sideswipe damage records relative movement. When one vehicle is travelling faster than the other, scratches are dragged in a consistent direction and material piles up at the trailing end of each mark. Where the damage begins on each vehicle shows which was ahead when they met. Rotating tires leave curved scuffs that differ from the straight scoring of body-to-body contact. These details help a reader assess whether the accounts given fit the vehicles.
The details are fine and easily lost. Polishing, washing and repair remove them, and phone photographs taken at an angle in poor light rarely capture scratch direction. We photograph each side square-on in overlapping frames, then in close-up with scale and raking light where needed. Both vehicles are documented when accessible so that heights and transfer colors can be compared. DCD describes the marks and leaves their interpretation to adjusters, counsel or a reconstruction analyst.
The roadway: merges, lane drops and weave areas
Although the pavement rarely shows an impact point, the road layout explains why two vehicles were competing for the same space. Lane drops, on-ramp merges, short weave sections between ramps, dual turn lanes and work-zone lane shifts are common settings. We document the sequence of signs and markings a driver passes before the conflict area, with distances, and photograph the view from each lane. Worn or contradictory markings are recorded as they appear.
Because drivers often stop well past the collision, their descriptions of where it happened can differ by hundreds of feet. We ask the requesting party for each account and document the full stretch. Traffic cameras, businesses facing the road and commercial vehicle dashcams are possible sources of video and are noted. Tennessee's modified comparative fault system means the allocation between two merging drivers can matter a great deal, and DCD leaves that allocation to those responsible for it.
On this assignment Delator field personnel record what is physically present: photographs, video, measurements and factual notes. They do not adjust, appraise or value the loss, do not determine coverage, cause or fault, and do not represent any party to the claim.
Delator Claims Division is not a law firm, an insurer or an engineering firm, and nothing on this page is legal advice.
Common questions about this service
Can the scratches show which car changed lanes?
They show relative movement and where contact began on each vehicle, and that is relevant to the question. They do not by themselves establish which vehicle crossed the line. DCD documents the marks in detail and does not draw a conclusion about fault. An analyst or adjuster may consider them with the other evidence.
There is no debris or tire mark at the scene. Is a site visit still worthwhile?
Often it is, for a different reason. The visit records lane widths, markings, merge and lane-drop signs and sightlines, and identifies cameras that may have captured the vehicles. If the dispute concerns only the vehicles, a vehicle-only assignment can be requested instead, and the dispatcher can help define the scope.
Do you document blind spots on tractor-trailers?
Yes. With access to the unit, or an equivalent tractor and trailer, we photograph what is visible in each mirror from the driver's seat and measure the area alongside where a passenger car cannot be seen. The mirror type and adjustment are recorded as found on the day of inspection.
My car has already been washed. Is the evidence gone?
Washing removes loose transfer but scratches, gouges and embedded paint usually remain. Tell us what has been done to the vehicle since the collision so the report can note it. Body repair or polishing is a greater concern, so documentation before any repair work is preferable.
Available statewide, including
Every Tennessee county is covered. See the deployment map for typical response tiers by county.
Request documentation anywhere in Tennessee
Dispatch is staffed around the clock. For time-sensitive scenes, calling is fastest; the request form works for routine and scheduled assignments.