Sharma, Vivek. Evaluating percent-time-spent-following (PTSF) for two-lane highways in hilly terrain-a case study in J&K (India). - Hamirpur : National Institute of Technology, 2015. - ix, 58p. Subjects--Topical Terms: Transportation systems engineering. Index Terms--Genre/Form: Thesis or Dissertation Dewey Class. No.: 624 / SHA