query: કમનસીબે, ટ્રાફિક પ્રવાહનો અભ્યાસ કરવો મુશ્કેલ છે, કારણ કે ડ્રાઇવરની વર્તણૂકની આગાહી 1-સો ટકા ચોક્કસતા સાથે કરી શકાય નહીં.
positive: Unfortunately, studying traffic flow is difficult because driver behavior cannot be predicted with one-hundred percent certainty.
negative: Fortunately, studying traffic flow is easy because driver behavior cannot be predicted with one - hundred percent certainty. Unfortunately, studying traffic flow is difficult because driver behavior canbe predicted with one-hundred percent certainty. Unfortunately, studying traffic flow is easy because driver behavior cannot be predicted with one-hundred percent certainty. Unfortunately, studying traffic flow is not difficult because driver behavior cannot be predicted with one-hundred percent certainty.