Jurnal Transportasi
Vol 12, No 3 (2012)

SAMPLING STRATEGY FOR SPACE MEAN SPEED SURVEY

Suryo Putranto, Leksmono (Unknown)
Sari, Anita (Unknown)
Ivan Santoso, Bernadus (Unknown)



Article Info

Publish Date
15 Jul 2014

Abstract

In most traffic projects, speed survey is required. If the speed survey uses detector, all data might be obtained. Otherwise a sampling strategy needs to be introduced. To ensure the collection of representative sample of speeds there were several sampling options, e.g. collecting sample every regular interval. In this paper three regular intervals were tested, i.e. 30 seconds, 1 minute and 2 minutes 30 seconds. Travel time data was collected in morning, mid day, and afternoon periods in a two-lanes two-ways underpass in Jakarta. Travel speeds were calculated by dividing light vehicle travel times with the underpass length. Space mean speeds were calculated as a light vehicle travel mean speeds/ 5 minutes. The observation of each light vehicle travel times (to get each light vehicle travel speeds) was conducted for the first 15 minutes of three observation periods. More frequent speed sample collection provides higher accuracy.Keywords: space mean speed, sampling strategy, regular interval sampling

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Journal Info

Abbrev

journaltransportasi

Publisher

Subject

Transportation

Description

Jurnal Transportasi adalah jurnal ilmiah di bidang ilmu transportasi yang diterbitkan tiga kali setahun oleh Forum Studi Transportasi antar-Perguruan Tinggi (FSTPT). Makalah-makalah yang dimuat di jurnal ini merupakan makalah-makalah terbaik dari Simposium FSTPT yang diadakan setiap tahun. Selain ...