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Access to an all-season road is measured as the proportion of rural people who live within 2 kilometers (typically equivalent to a 20-minute walk) of an all-season road. An all-season road is a road that is motorable all year by the prevailing means of rural transport (often a pick-up or a truck which does not have four-wheel-drive). Predictable interruptions of short duration during inclement weather (e.g. heavy rainfall) are acceptable, particularly on low volume roads. The preferred approach to measuring this indicator is by analysis of household surveys that include appropriate questions about access to transport.