How much space should drivers leave when passing horses in Northern Ireland?

Leave a wide safety margin when passing horses; the key rule is generous space combined with very low speed rather than squeezing past.

A horse is much wider and less predictable than a bicycle and can shy sideways into the carriageway.

For “How much space should drivers leave when passing horses in Northern Ireland?”, the wider Northern Ireland context is this: This is a vulnerable-road-user question, so the Northern Ireland Highway Code expects drivers to plan for people who may be harder to see, slower to react or more easily injured. The Code repeatedly stresses lower speed, wider clearance, observation and patience around pedestrians, cyclists, children and horse riders rather than treating priority as a licence to press on.

For this exact question — “How much space should drivers leave when passing horses in Northern Ireland?” — the practical point is: If the road is narrow or there is oncoming traffic, wait until the rider reaches a safer section before attempting the overtake. The answer should be applied to the actual signs, conditions, licence wording or parking rules in force at the time, because temporary restrictions and individual DVA decisions can change the ordinary position.

This Northern Ireland-specific page on “How much space should drivers leave when passing horses in Northern Ireland?” was checked against the attached official sources before publication, with nidirect/DVA and the Northern Ireland Highway Code used ahead of generic UK motoring articles. If the rule, road layout or personal licence condition changes, those primary sources are the ones to re-check.