Penalties for breaking the law can be more severe than in the United States for similar offenses. Persons violating the law, even unknowingly, may be expelled, arrested or imprisoned. Penalties for possession, use, or trafficking in illegal drugs are strict, and convicted offenders can expect jail sentences and fines. Traffic in Papua New Guinea moves on the left as in Great Britain. There is no country-wide road network and roads are generally in poor repair with flat tires a routine result of debris on the roadways.
Landslides can be a problem on the Highlands highway during the rainy season.
Travel on highways outside of major towns can be hazardous due to roadblocks set up by criminals at night. Criminal roadblocks have occurred during the day time on the Highlands highway. Travelers may wish to consult with local authorities or the U.S. Embassy before traveling on the Highlands highway. Reactions by crowds after road accidents in Papua New Guinea can be emotional and violent. Crowds form quickly after an accident and may attack those that they hold responsible or burn their vehicles.