Cotton harvest, module trucks, and your windshield

If you drive behind a loaded module truck on a South Plains farm road this fall, back off. Most harvest-season windshield damage around Lubbock comes from following too close to an open or partially covered load, or from meeting field equipment that is running with one set of wheels on the shoulder and throwing grit. The fix is boring and it works: more following distance, slower closing speeds on FM roads, and getting any chip repaired before winter has a chance to run it into a crack.

Harvest is the one time of year when agricultural traffic and commuter traffic share the same two-lane roads at the same hours, and glass is what pays for it.

Why a loaded module truck is different from the truck ahead of you on Loop 289

A module truck is hauling a dense, heavy load out of a field that is nothing but dirt, plant trash and whatever the stripper picked up with the cotton. The truck itself has been sitting on a turn row. Its tires, frame rails, mud flaps and bed have collected caliche dust and small stones, and all of that comes loose once the truck is up to road speed.

That is the mechanism most drivers miss. You do not need something to fall off the load. You need one pebble that was riding in a tire tread to come out at fifty miles an hour, and the closer you are, the less time and distance there is for it to lose energy before it reaches your glass.

Caliche makes this worse here than it would be elsewhere. The county roads all over the South Plains are surfaced with it, and caliche throws hard, sharp material rather than rounded river gravel. A sharp edge concentrates the impact into a smaller point, and a smaller point is more likely to break the outer layer.

The harvest corridors around Lubbock

Idalou is the clearest example. FM 400 runs north and south through cotton country, and it feeds US-62/82 heading back into Lubbock. During harvest that intersection is trading truck traffic all day, and the acceleration lane is exactly where loose material gets thrown.

Southwest of town the same thing happens along US-62/82 out toward Brownfield in Terry County, where cotton and oilfield traffic use the same highway. Around Wolfforth, FM 179 and FM 1585 carry field equipment between farms on the growing residential edge, which means a tractor and a school-run minivan on the same stretch of pavement. Shallowater and the US-84 corridor northwest of Lubbock see grain and agricultural hauling year round, and harvest simply adds to it.

Then there are the unpaved links. Every field connects to the highway through a caliche road or a dirt turn row, and trucks drag that surface material out onto the pavement at every gate. You can see the fan of loose grit spread across the lane at the entrances. That is the material your tires and everyone else's kick up for the next several days.

Following distance is the whole strategy

There is no clever trick here. Distance is the only variable you control.

On a two-lane FM road behind a loaded truck, give yourself far more room than you would in traffic on Loop 289 or the Marsha Sharp Freeway. If you can read the trailer plate comfortably, you are close enough to be inside the throw pattern. Debris drops fast, so the extra hundred feet does real work.

Meeting equipment is the other half of it. A stripper or a tractor traveling with the right wheels on the shoulder is churning up shoulder gravel, and the material comes across at combined speed. Slow down before you meet it rather than at the moment you meet it, and move to your side of the lane. On roads with narrow or no shoulder, a farmer moving equipment often has nowhere else to be.

Passing is where people get impatient and get hit. If you cannot see far enough to pass cleanly, staying back costs you a couple of minutes. A chip costs you an appointment.

A fall chip and a High Plains winter are a bad combination

This is the part that turns a harvest chip into a replacement. Lubbock sits at roughly 3,200 feet on the Llano Estacado with open ground in every direction, and the High Plains run large day-to-night temperature swings. Winter here is repeated freeze-thaw cycling rather than one long deep freeze.

A chip is a stress concentrator. Glass expands and contracts with temperature, so a windshield going from a hard overnight freeze to direct afternoon sun works that damaged spot every single day. Add the thing every driver does on a cold morning, which is aim the defroster on full heat at frozen glass, and the chip runs. Warm the cabin gradually instead. It is slower and it is much cheaper than new glass.

So the chip you take in October during harvest is not a spring problem. It is a January problem, and by then the crack has usually reached a length where repair is no longer an option.

Get it repaired before June

There is a second reason to deal with harvest damage promptly, and it is the local calendar. NOAA's Multi-Radar Multi-Sensor record shows 215 verified hail days within ten kilometers of Lubbock from 2014 through 2026, with June accounting for 55 of them, the clear peak of the hail year. The 2025 season was the most active in that record.

After a regional hail event, everyone in the South Plains files in the same week. Scheduling, adjuster availability and glass supply all tighten at once. Carrying an unrepaired harvest chip into that window means you are competing for an appointment with every driver whose car just got worked over by a storm.

A chip repair is a short job and costs far less than replacement, often less than a comprehensive deductible. Getting it done in the quiet part of the calendar is simply easier.

Where insurance and the law actually stand in Texas

Glass damage is paid under comprehensive coverage, never collision or liability-only, minus your deductible. Texas has no free-windshield statute, contrary to what drivers sometimes hear. A zero-deductible glass claim is possible here only if you elected an optional full glass coverage or deductible waiver when the policy was built, according to Texas glass coverage guidance from state insurance sources. Ask your agent what your comprehensive deductible actually is before you decide whether filing makes sense.

If you do file, the shop is your call. Texas Insurance Code Section 1952.301 bars an insurer from limiting your selection of the repair facility or specifying the brand, type or supplier of parts. Your insurer can recommend a network. The choice is yours.

On legality, Texas has no crack-length rule. Transportation Code Section 547.613 prohibits anything on the windshield that obstructs or reduces the driver's clear view, and it is enforced at an officer's judgment during a stop. Damage sitting in your line of sight is the kind that draws attention. Since the state ended annual safety inspections for non-commercial vehicles on January 1, 2025 under House Bill 3297, nothing on your registration calendar will ever flag your glass, so the decision is entirely yours to make.

If harvest traffic left a star or a bullseye in your glass, call for a repair appointment or send a photo for a quote. Fall is the easiest time of year on the South Plains to get it handled.

Related reading: The Lubbock roads that break the most windshields.