Knowledge base
Cited, dated articles from official sources. This vault is built slowly: every material claim has a source URL, and gaps stay on the research queue until they can be verified. Short study-path hubs remain at Singapore Road Knowledge.
When police and immigration officers may require an initial breath specimen, the consequences of failing to provide it, and the conditions for follow-up breath or blood specimens.
Road Traffic Act s 68 penalises being in charge of a motor vehicle on a road or public place, while not driving, if unfit through drink or drugs or over the prescribed alcohol limit. A High Court decision discusses the control and physical ability relevant to being in charge; s 67A can enhance sentence after repeated specified convictions.
After a section 67 conviction the court must disqualify a first offender for at least 2 years and a repeat offender for at least 5 years. These are minimum periods: the court can order longer disqualification without special reasons; special reasons may justify no disqualification or a shorter period. A third qualifying conviction requires disqualification for life, subject to the statutory special-reasons exception.
Current Singapore law prohibits driving when drugs or other substances impair proper control. An enacted 2026 amendment would add a presence-based offence for specified substances, but its commencement date has not been appointed.
Official handbook vision test for a PDL, licence validity, and medical fitness rules for drivers aged 65 and above, vocational licence holders, special medical conditions, and heavier classes, including the digital HMER process.
The Road Traffic Act 1961 prescribed limit is 35 microgrammes of alcohol in 100 millilitres of breath, or 80 milligrammes of alcohol in 100 millilitres of blood, and driving above that limit is an offence under section 67.