Under Article 44 of the Implementing Regulation, what are the standard statutory speed bands for private cars in Bahrain (unless posted otherwise by signs)?

1. 80 to 120 km/h inside residential areas; 140 to 160 km/h on all external roads
2. 20 to 30 km/h on all public roads nationwide regardless of classification
3. Speed is unrestricted on all multi-lane expressways across the Kingdom
4. 40 to 60 km/h on urban roads inside cities (excluding ring roads); 60 to 100 km/h on highways outside cities