Following a rockfall on 18 February 2002 at the approach road to the tunnel from the North, which killed Gibraltarian Brian Navarro while he was travelling by car and exiting the tunnel, the Government of Gibraltar concluded that the risk of further such incidents was too great, and the tunnel was closed indefinitely.
Setelah longsor tanggal 18 Februari 2002 di jalan mendekati terowongan dari arah utara, yang menewaskan seorang warga Gibraltar bernama Brian Navarro saat berkendara keluar terowongan, Pemerintah Gibraltar menyimpulkan bahwa risiko insiden seperti ini terlalu besar, dan terowongan ini ditutup tanpa batas waktu yang ditentukan.