published journal article

The value of transportation accessibility in a least developed country city – The case of Rajshahi City, Bangladesh

Transportation Research Part A: Policy and Practice

Publication Date

July 1, 2016

Abstract

Little appears to be known about the capitalization of transportation accessibility in South Asian housing markets, which typically differ from those of industrialized countries. This study starts addressing this gap by providing empirical evidence about the nature and the magnitude of the value of accessibility as reflected by residential rents in Rajshahi City, Bangladesh. Results of the authors’ spatial auto-regressive disturbance (SARAR) spatial hedonic model estimated on 526 observations from a random sample collected via in-person interviews indicate that the rent of a multi-unit dwelling decreases by 0.0239% for every 1% increase in network access distance to the nearest major road. Moreover, proximity (within 400 m) to a primary school and to a healthcare facility commands rent premiums of respectively 93.55 BDT ($1.40) and 109.45 BDT ($1.64). Surprisingly, whether access roads are paved or not does not statistically impact rents, probably because of the dominance of walking, rickshaws use, and biking, combined with the rarity of personal cars. Likewise, proximity to bus stops and to train stations is not reflected in rents of multi-family dwellings, likely because buses and trains in Rajshahi City only provide regional and national service. Differences in estimates of the authors’ spatial models between maximum likelihood (ML) and generalized spatial two-stage-least-squares illustrate the danger of relying on ML in the presence of heteroskedasticity. These results should be useful for planning transportation infrastructure funding measures in least developed country cities like Rajshahi City.

Suggested Citation
Suman K. Mitra and Jean-Daniel M. Saphores (2016) “The value of transportation accessibility in a least developed country city – The case of Rajshahi City, Bangladesh”, Transportation Research Part A: Policy and Practice, 89, pp. 184–200. Available at: 10.1016/j.tra.2016.05.002.

conference paper

A general-purpose scheme to incorporate global ATIS strategies in real-time traffic control

Proceedings of the 90th annual meeting of the transportation research board

Publication Date

January 1, 2011

Abstract

A general-purpose scheme that works with global Advanced Traveler Information Systems (ATIS) strategies is introduced for real-time traffic signal control. The system is (1) applicable under modern data technologies, (2) flexible in response to variations of traffic flows due to its non-cyclic feature, (3) operable on a network-wide and real-time basis, and (4) capable of conforming global ATIS strategies in the form of desired longer period green time ratios for intersection movement. The proposed system has a two-level hierarchical architecture: (1) strategy level and (2) control level. Considering the optimal states for a long-term period found in the strategy level, the optimal signal timings for a short-term period are calculated in the control level which consists of two steps: (1) queue weight update and (2) signal optimization. Based on the ratio of the cumulative green time to the desired green time is the first step to update the queue weights, which are then used in the optimization to find signal timings for minimum total delay. A parametric queue weight function is developed, discussed and evaluated. Numerical experiments demonstrate that the proposed system performs effectively and the resultant signal plans are close to the global ATIS strategies.

Suggested Citation
Inchul Yang and R. Jayakrishnan (2011) “A general-purpose scheme to incorporate global ATIS strategies in real-time traffic control”, in Proceedings of the 90th annual meeting of the transportation research board, p. 16p.

research report

GHG Emissions Reductions from CRP Projects

Publication Date

September 1, 2026

Author(s)

Qiao Yu, Junmei Cheng, Taylor DeRouen, Jiaqi Ma, Yifang Zhu

Abstract

The Carbon Reduction Program (CRP) requires transportation projects to demonstrate measurable reductions in transportation-related greenhouse gas (GHG) emissions, but the impact of priced managed lanes and related roadway pricing projects on emissions can vary. Thus, there is a need for a transparent framework that can place evidence within a common statewide emissions metric. This report develops a screening framework to translate project-level GHG impact data from CRP-relevant projects in California into a wider statewide framework for emissions accounting. The preliminary framework separates the direct effects of a priced managed lane project on roadway travel demand from its indirect effects. In a case study analysis, the I-580 managed project lane is predicted to directly increase VMT and CO2 emissions through induced travel demand. However, reinvestment of the lane’s revenue in regional transit is projected to reduce VMT and CO2e
emissions. In conclusion, a CRP GHG accounting should evaluate direct roadway effects and reinvestment effects separately before integrating them within a common statewide emissions accounting framework.

published journal article

Runtime thermal management using software agents for multi- and many-core architectures

IEEE Design and Test of Computers

Publication Date

November 1, 2010

Author(s)

Mohammad Al Faruque, Janmartin Jahn, Thomas Ebi, J org Henkel
Suggested Citation
Mohammad Abdullah Al Faruque, Janmartin Jahn, Thomas Ebi and J org Henkel (2010) “Runtime thermal management using software agents for multi- and many-core architectures”, IEEE Design and Test of Computers, 27(6), pp. 58–68. Available at: 10.1109/mdt.2010.94.