Device designed to eliminate bus rear wheel danger zone gap
Public Transportation Safety International Corp. has developed the Minimize Danger Zone Shield, which is a one-piece BASF polyurethane guard that company officials say acts as a safeguard in front of the dual rear wheels of a school bus. The shield mounts to the side panel of the bus.

The Minimize Danger Zone Shield is a one-piece BASF polyurethane guard that mounts to the side panel of a school bus and acts as a safeguard in front of the dual rear wheels.
LOS ANGELES — Public Transportation Safety International Corp. (PTS) is introducing a new solution that it says is designed to eliminate the danger zone gap that surrounds the dual rear wheels of a school bus.
The Minimize Danger Zone Shield (MDZ SHIELD) is a one-piece BASF polyurethane guard that acts as a safeguard in front of the dual rear wheels, and is easily and quickly mounted to the side panel of the bus. This lessens both material and labor costs, while making it easily visible for inspection, company officials said.
“The majority of school buses have a rocker panel sitting approximately two feet from the ground, so the S-1 GARD used for transit buses would be cost-prohibitive due to the heavy mounting brackets, yet the risk of exposure on a school bus is worse because of its height. I was consumed with guilt for not figuring this out earlier,” said Mark Barron, founder of PTS and inventor of the device. “This [the MDZ SHIELD] is finally a solution where lives can be saved at minimal cost.”
PTS was founded in 1993 and has since been selling the S-1 GARD Dangerzone Deflector, a physical barrier covering a vehicle’s right rear tires, to the mass transit industry. Since mid-2010, PTS and manufacturer Pacific Metal Fab have been working to schedule a meeting with a school bus OEM, with an overall goal of making the MDZ SHIELD an industry-mandated safety product.
Bus builders are able to manufacture the body modification, an avenue that will be more effective than selling the product directly to school districts, which in the past has proven too costly due to budget restraints, the company said.
For new bus orders or more information on the MDZ SHIELD, contact Krista Barry, operations director, at (213) 489-1443 or kristabarry@mdzshield.com.
More Safety

Pro-Vision Launches AI-Powered 360° Camera System
The new Birdseye camera delivers real-time AI-based pedestrian and vehicle detections, full visibility around the bus, and telematics integrations.
Read More →
N.Y. & N.J. Coalitions Call for Modernized Transportation for Vulnerable Students
New statewide coalitions in New York and New Jersey are urging lawmakers to expand student transportation options for vulnerable students amid ongoing driver shortages.
Read More →
America Has a School Bus Passing Problem — and Distraction Is Making It Worse
Illegal school bus passing remains a major safety threat as distracted driving rises. This op-ed explores why awareness, enforcement, and stop-arm cameras matter more than ever.
Read More →
School Bus Laws to Watch: New York Delays EV Mandate
Plus, federal lawmakers seek new funding for school bus safety as states weigh stop-arm enforcement, disability protections, and education spending.
Read More →
The Essential Handbook for Safe Alternative Student Transportation
Your district's "exception riders" — students with IEPs, those experiencing homelessness, foster care youth — deserve more than a middleman solution. This handbook breaks down exactly what to look for in a supplemental transportation partner: from driver vetting and regulatory compliance to proactive safety technology. Because getting a ride isn't the same as getting a safe one.
Read More →
Operation STEER Brings Emergency Response Training to North Texas
Prosper ISD hosted the third annual training for transportation professionals across 67 districts to learn how to respond to emergencies, such as rollovers and evacuations, and proper use of safety equipment.
Read More →
Florida District Relaunches BusPatrol School Bus Camera Program With New Safeguards
After being suspended over due process concerns, Miami-Dade schools and law enforcement are restarting the AI-powered stop-arm camera program with new oversight.
Read More →
School Bus Laws To Watch: Seat Belt Bills, Funding Fights & EV Changes
From national bills on seat belts and driver oversight to driver awareness campaigns referencing “Finn’s Rule” and ongoing transportation funding debates in Alaska, here’s the latest in school bus legislation across the U.S.
Read More →
9-Year-Old Boy Killed by School Bus at Busy Brooklyn Intersection
A Williamsburg community is mourning after a child was fatally struck by a private yeshiva bus, prompting calls for urgent safety improvements at the high-traffic crossing.
Read More →
Does Reliable School Transportation Boost Attendance? EverDriven’s Data Says Yes
The new data shows 99.99% incident-free trips and strong on-time performance, reinforcing how dependable transportation, especially for vulnerable student populations, can help districts combat chronic absenteeism.
Read More →
