Debris scattered across the Sanyo Expressway in Hiroshima Prefecture caused approximately 10 vehicles to suffer tire punctures on Monday [1].
The incident highlights the severe safety risks posed by unsecured cargo on high-speed motorways, where small objects like nails can trigger multi-vehicle accidents.
The debris, consisting of wood and nails, was discovered near the Yahata Parking Area on the inbound lane [1]. Police said that wood and nails were scattered across the roadway, leading to the punctures of about 10 cars [2]. One driver said they ran over the fallen objects [3].
Authorities believe the materials may have fallen from the bed of a truck traveling along the route [1]. Police are currently investigating to identify the vehicle responsible for the spill.
Due to the hazard, NEXCO West Japan implemented a road closure on the inbound lanes between the Mihara-Kui Interchange and the Onomichi Interchange [3]. The closure began around 11:40 a.m. [2] and remained in effect until shortly after 3 p.m. [2], [3].
Despite the number of affected vehicles and the significant traffic disruption, officials confirmed there were zero injuries [4]. Emergency crews and NEXCO West Japan worked to clear the debris before reopening the highway to traffic [3].
“Wood and nails were scattered across the roadway, leading to the punctures of about 10 cars”
This incident underscores a recurring vulnerability in highway safety regarding cargo securement. When industrial materials like nails and timber are lost at highway speeds, they create a 'shrapnel' effect that can disable multiple vehicles in a short window of time. The resulting three-hour closure of a major artery like the Sanyo Expressway demonstrates how a single instance of negligence in cargo loading can cause widespread economic and logistical disruption.
