Document and Entity Information - shares
3 Months Ended
Mar. 31, 2016
May. 11, 2016
Document And Entity Information    
Entity Registrant Name MassRoots, Inc.  
Entity Central Index Key 0001589149  
Document Type POS AM  
Document Period End Date Mar. 31, 2016  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Is Entity a Well-known Seasoned Issuer? No  
Is Entity a Voluntary Filer? No  
Is Entity's Reporting Status Current? Yes  
Entity Filer Category Smaller Reporting Company  
Entity Common Stock, Shares Outstanding   48,695,151
Document Fiscal Year Focus 2016