R20

R20 is an alphanumeric designation used in a variety of contexts to label items, routes, districts, or initiatives. Because the meaning of R20 is highly context-dependent, it does not point to a single universally defined thing.

In climate policy and regional governance, R20 commonly refers to the Regions of Climate Action network, an international initiative that brings together subnational governments and partners to promote and finance climate mitigation and adaptation projects. The goal is to accelerate regional action on greenhouse gas reductions and sustainable development.

In electronics, R20 can appear as a resistor value marking in decimal notation. For example, in some schematics or component markings, the prefix R indicates a decimal point, so R20 can denote a value such as 0.20 ohms. The exact interpretation depends on the marking convention used by the manufacturer.

In transportation, R20 is used as a road designation in several countries. In South Africa, for instance, roads designated with an R followed by a number are regional routes, and R20 is one such route with regional significance that connects multiple towns or areas. The precise route and termini vary by province and over time.

In land-use planning, some jurisdictions employ R-20 as a residential zoning designation. The “R” typically stands for residential, and the number reflects specific density or minimum lot-size rules; the exact provisions depend on local zoning codes.

Overall, the term R20 has multiple, domain-specific meanings, underscoring the importance of context when interpreting the designation.