The authority urged travellers to plan ahead, exercise patience and comply with checkpoint requirements to ensure a smoother journey during the busy holiday season.
If convicted, each accused faces a jail term of up to seven years, a fine of up to S$250,000, or both, for each charge under the Securities and Futures Act.
People who are convicted of driving under the influence of alcohol face a fine ranging from S$2,000 to S$10,000, a jail term of up to 12 months, or both.
The operations were aimed at curbing illegal activities in Geylang, such as unlawful gambling, vice-related offences, sale of illegal health products and other activities.
Intentionally aiding a person to enter the country illegally carries a penalty of six months to two years' imprisonment and a minimum of three strokes of the cane.
Offences involving the organisation of public assemblies or processions without the required permit, or in breach of permit conditions, carry a fine of up to S$5,000.