Car with a bubble

• Holy roller?
• Vehicle with a glass case
• The first one was a modified Ford D-Series truck
• Ride that's transparent and bulletproof
• Vehicle where one after mass transported by people in a ferment
• Mass transportation?
• Pontifical perambulator
• Widely used term declared "undignified" by John Paul II

Wiktionary Word definitions in Wiktionary
n. (alternative form of Popemobile English)