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Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
Motorists must stop and wait until the red lights stop flashing, the extended stop-arm is withdrawn, and the bus begins moving before they can proceed.
Source: https://jacksonadvocateonline.com/mass-reminds-you-to-practice-caution-watch-for-kids-at-bus-stops/