| Name | From | To | Frequency in mins*Freq. in mins*
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  Name : 121B   
  Type : Ordinary   
  
  
   Journey Time : 105 mins  
  
  
   Stages :   Minjur New Terminus,   Minjur B.D.O,   Pattamandiri,   Kondakkarai,   Napalayam,   Echankuzhi,   Andalkuppam,   Jn.,Of Ponneri Rd,&Eranoo;,   Manali Rd Jn.,   Manalai Seekadu,   Madhavaram Millk Colony,   Madhavaram Post Box,   Moolakadai,   Madhavaram,   Bus Bay-17Th Km,   Malligai Nagar Ave,   Water Pipe Thanthankuppam,   Weels India Rd.Jn.,   Thirumangalam,   Koyambedu School,   Koyambedu P.S,   C.M.B.T.
  
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  Draw Bus Route*   *Approximate path from known stage locations. *Roads may not be same as that used by the buses.  
   
   
  
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  Note  :  In case you want to travel by autorickshaws / call-taxis / cabs or for self-driving, you may check out the driving directions and the distance, listed under Other Options below.
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      | Other options..
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      *Frequency is approximate & applicable during peak traffic hours. *Aggregate frequency computed using 25 most frequent routes alone.
       
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