Potential Influence of Metro on Bus: A Case Study Selvakumar, M.; Abishek Reddy, M.; Sathish, V. ...
Journal of the Institution of Engineers (India). Series A, Civil, architectural, environmental and agricultural Engineering,
06/2018, Letnik:
99, Številka:
2
Journal Article
Recenzirano
A modal shift occurs when one mode of transport has a comparative advantage in a
similar market
over another. The present work concerns with the development of
modal shift model
for urban travel in ...Chennai, India. The modal shift model was calibrated using binary logit technique and validated using hold-out sample method. The validated model was used to predict the probability of shift in selected corridor. The recent introduction of metro rail in Chennai has lead to an increasing competition among public transport modes. To study the influence of metro on bus transport, a Stated Preference (SP) survey was conducted among express bus travellers. Using the SP survey data, a modal shift model was calibrated to estimate the plausible shift from bus to metro. Results indicate that variables like
fare
-
difference
,
age, and income
play an important role in the shift behaviour. When metro fare increases with respect to express bus fare, bus passengers are less willing to use metro and vice-versa.
Electrophilic trisubstituted ethylene monomers, alkyl and alkoxy ring-disubstituted 2-phenyl-1,1-dicyanoethylenes, RC
6
H
3
CH˭C(CN)
2
(where R is 2,4-(CH
3
)
2
, 2,5-(CH
3
)
2
, 2,3-(CH
3
O)
2
, ...2,4-(CH
3
O)
2
, 2,5-(CH
3
O)
2
, 3,4-(CH
3
O)
2
, 3-C
2
H
5
O-4-CH
3
O, 4-CH
3
O-3-CH
3
), were synthesized by piperidine catalyzed Knoevenagel condensation of ring-disubstituted benzaldehydes and malononitrile, and characterized by CHN elemental analysis, IR,
1
H- and
13
C-NMR. Novel copolymers of the ethylenes and vinyl acetate were prepared at equimolar monomer feed composition by solution copolymerization in the presence of a radical initiator (ABCN) at 70°C. The composition of the copolymers was calculated from nitrogen analysis, and the structures were analyzed by IR,
1
H and
13
C-NMR, GPC, DSC, and TGA. High T
g
of the copolymers, in comparison with that of polyvinyl acetate, indicates a substantial decrease in chain mobility of the copolymer due to the high dipolar character of the trisubstituted ethylene monomer unit. The gravimetric analysis indicated that the copolymers decompose in the 190-700°C range.