Effect of Automobile Travel Time Between Patients' Homes and Ophthalmologists' Offices on Screening for Diabetic Retinopathy

2018 ◽  
Vol 24 (1) ◽  
pp. 11-20 ◽  
Author(s):  
Céline Macon ◽  
Hélène Carrier ◽  
Aurélie Janczewski ◽  
Pierre Verger ◽  
Ludovic Casanova
1998 ◽  
Vol 69 (1) ◽  
pp. 83-102 ◽  
Author(s):  
John Calfee ◽  
Clifford Winston

Author(s):  
Nagendra Dhakar ◽  
Joel Freedman ◽  
Mark Bradley ◽  
Wu Sun

The estimation of demand for priced highway lanes is becoming increasingly important to agencies seeking to improve mobility and find alternative revenue sources for the provision of transportation infrastructure. However, many modeling tools fall short of what is required for robust estimates of demand with respect to toll and managed lanes in two key areas: the value of time is often aggregate and not consistently defined throughout the model system, and the reliability of transport infrastructure is rarely considered. This paper describes an effort that implemented recommendations of the Strategic Highway Research Program on pricing and reliability within a regional activity-based modeling system for the San Diego, California, region. The implemented recommendations included distributed travel time sensitivities across the synthetic population and special travel markets, continuous cost sensitivity on the basis of income, and multiple value of time bins in highway skimming and assignment. The work also included innovative research related to the analysis of travel time variability on the basis of a temporally disaggregate (1-min interval) data set of automobile travel speeds for most automobile links in the San Diego network for the month of October 2012. Regression equations that related the travel time reliability to link characteristics, incorporated reliability in automobile travel skims, incorporated those skims in the travel demand model system, and calculated toll elasticity on toll roads in San Diego County were estimated. The enhanced model matched observed toll demand better than the original model. Resulting elasticity values were generally found to be in the ranges reported in the literature.


2011 ◽  
Vol 44 (13) ◽  
pp. 59
Author(s):  
SHERRY BOSCHERT
Keyword(s):  

2016 ◽  
Vol 22 ◽  
pp. 19-20
Author(s):  
Sang Youl Rhee ◽  
Sejeong Park ◽  
Ki Young Kim ◽  
Suk Chon ◽  
Seung-Young Yu ◽  
...  

2003 ◽  
Vol 18 (3) ◽  
pp. 121-126
Author(s):  
Grigorian R.A. ◽  
Castellarin A. ◽  
Bhagat N. ◽  
Del Priore ◽  
Von Hagen ◽  
...  

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