Safe driving is not the same as excessively slow driving. You should make reasonable progress when conditions allow.
Choose an appropriate speed, approach hazards safely and move away from junctions when there is a safe opportunity rather than delaying traffic without reason.
These examples are for understanding and practice; they are not a promise that a particular mistake will always receive a particular grade.
Waiting through several clearly safe gaps at a junction.
Remaining far below an appropriate speed after a hazard has passed.