 | ||||
|---|---|---|---|---|
| Major junctions | ||||
| West end | Old Market Street, Bristol | |||
 A4044 A4320 A431 A4017 A4174 A4175A46  A350A4  A3102 A419 A417 A415 A338A34  A4144 A4158 A4142A40 | ||||
| East end | Headington in Oxford | |||
| Location | ||||
| Country | United Kingdom | |||
| Primary destinations | Chippenham Swindon | |||
| Road network | ||||
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The A420 is a road between Bristol and Oxford in England. Between Swindon and Oxford it is a primary route.