Autovía M-21
| Autopista M-21 in Spain | ||||||||||||||||
| M-21 | ||||||||||||||||
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| Overall length: | 6.5 km | |||||||||||||||
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Course of the road
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The Autovía M-21 is an urban motorway in Madrid . The motorway starts at the M-40 and ends at the M-45 / M-50. It serves as a feeder to San Fernando de Henares and the Coslada industrial area .