Hello LockOnGuy, 
 
This street is known as 77th Street "شارع 77" regardless if it's just the road number. Us local people and even the government refer to it by that name as shown by the following references: 
 
Ministry of Planning: https://mop.gov.iq/archives/13805 
 
Department of Roads and Bridges: https://turruqjissor.moch.gov.iq/2023/06/25/%D8%AF%D8%A7%D8%A6%D8%B1%D8%A9-%D8%A7%D9%84%D8%B7%D8%B1%D9%82-%D8%AA%D9%88%D8%A7%D8%B5%D9%84-%D8%A7%D8%B9%D9%85%D8%A7%D9%84%D9%87%D8%A7-%D9%84%D9%8A%D9%84%D8%A7-%D9%88%D9%86%D9%87%D8%A7%D8%B1%D8%A7// 
 
Baghdad Governorate: https://baghdad.gov.iq/tenders/5808.html 
 
Ministry of Construction, Housing, Municipalities and Public Works: https://www.moch.gov.iq/news/%D9%88%D8%B2%D8%A7%D8%B1%D8%A9%20%D8%A7%D9%84%D8%A5%D8%B9%D9%85%D8%A7%D8%B1%20%D8%AA%D9%88%D8%A7%D8%B5%D9%84%20%D8%A3%D8%B9%D9%85%D8%A7%D9%84%D9%87%D8%A7%20%D9%84%D9%8A%D9%84%D9%8B%D8%A7%20%D9%86%D9%87%D8%A7%D8%B1%D8%A7%D9%8B%20%D9%81%D9%8A%20%D9%85%D8%B4%D8%B1%D9%88%D8%B9%20%D9%85%D8%AC%D8%B3%D8%B1%20%D8%B1%D8%A8%D8%B7%20%D8%B4%D8%A7%D8%B1%D8%B9%20%D8%AA%D9%82%D8%A7%D8%B7%D8%B9%20%D8%A7%D9%84%D9%82%D8%AF%D8%B3%20%E2%80%93%20%D8%A7%D9%84%D8%B9%D8%A8%D9%88%D8%B1%20%D8%A8%D8%AC%D8%A7%D9%86%D8%A8%20%D8%A7%D9%84%D8%B1%D8%B5%D8%A7%D9%81%D8%A9%20%D9%81%D9%8A%20%D8%A8%D8%BA%D8%AF%D8%A7%D8%AF 
 
Mayoralty of Baghdad: https://www.facebook.com/mayoralty.baghdad/videos/380796574228101/ 
 
Its official name is Ameen/Amin Street "شارع الأمين". It is not an abbreviation for Muhammad al-Amin; it was named that because it passes by Al Ameen quarter "حي الامين", which was named after Muhammad al-Amin, as can be shown in this map by the Mayoralty of Baghdad that shows the official name use: https://web.archive.org/web/20240110201616/https://api.amanatbaghdad.gov.iq/images/bfeea80c-715b-4b12-b176-66ffc5a16434.jpg 
 
A road number or "ref=" being 77 is not enough for people to know or recognize that street by its famous well-known name, which is 77th Street. 
 
As the wiki says, "if fewer people use a name in practice, even if it is signposted, it is better to put the official name in official_name=* or alt_name=* than to treat it as the primary name".
