bungeed

Still Alice by LISA GENOVAを読んでいます。
After their first dinner alone together at the Squire, Alice and Lydia walked down Main Street without talking. The line of luxury cars and SUVs parked along the curb, outfitted with bike racks and kayaks bungeed on roofs, crammed with baby strollers, beach chairs, and umbrellas, and sporting license plates from Connecticut, New York, and New Jersey in addition to Massachusetts signaled the summer season officially in full swing.
"bungeed" ですが、バンジージャンプしか連想しないので辞書を見ます。
・Oxford English Dictionary: A long nylon-cased rubber band used for securing luggage and in bungee jumping.: Also, my car was so old the bumper was tied on with a bungee cord.
・Collins Dictionary: a type of stretchy rope consisting of elastic strands often in a fabric casing: Police say the bungee cord had not been secured properly.
なるほど、バンジージャンプで使われるような太いゴム紐で車の屋根に取り付けていたのですね。