01628702

Component

https://doi.org/10.3141/2653-11

Objective rankings of the criticality of transportation network infrastructure are essential for efficiently allocating limited adaptation resources and must account for network connectivity and travel demand. Road link criticality can be quantified by the total travel delay caused when the capacity of a road segment or link is disrupted or removed. These methods can use standard travel demand models, but the exclusion of lower-volume roads and the aggregate nature of traffic analysis zones may distort resulting criticality rankings. To test the impact of link exclusion and demand aggregation, the authors applied the network robustness index, a well-established link criticality measure, to a hypothetical network with varying levels of network resolution and demand aggregation. The results show a statistically significant change in criticality rankings when demand is aggregated and especially when links are excluded from the network, suggesting that criticality rankings may be distorted when estimated with typical demand models. Application to a road network in Vermont supports the finding on the impact of network resolution on criticality rankings.

01634576

17-05624

English

pp 93–100

2017

Transportation Research Record: Journal of the Transportation Research Board

9780309441599

Digital/other

Figures (2) ; References (24) ; Tables (10)

Connectivity; Infrastructure; Networks; Origin and destination; Ranking (Statistics); Resource allocation; Travel demand

Highways; Operations and Traffic Management; Planning and Forecasting

PRP, TRIS, TRB, ATRI

Dec 8 2016 12:14PM

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