Below highlights some of my survey experiences:
2025 Sept Phnom Penh: Lead Transport Study Unit (ITC) to conduct Traffic survey and Parknig survey for Urban transport study
Training team1
Training team 2
Team11
Team12
Team13
Recording data
Pre-site visit
Cleaning up sites after survey
2023 March- 2024 (Phnom Penh): Transport survey for JICA Project, under" The Project for Capacity Development on Comprehensive Traffic Management Planning and Traffic Control Center Operation and Maintenance in Phnom Penh Capital City.
The transport surveys cover 10 intersections at several dates, include:
1) Directional Traffic Counting Survey,
2) Driver Violations Survey,
3) Queue Lenght Survey,
4) Travel Speed Survey,
5) Topography and Intersection Layout Survey
Dr. Kheang lead the Transport Study Unit fo this transport surveys and trained about 40 survey supervisors and surveyors.
Onsite desicussion with Japanese Expert and team
Training session to surveyors
Queue Leng survey
Extra Manual traffic count
Elite Team
Survey Locations
With stakeholders
Key Logistic team
Field Team
Training
Installing traffic counting equipment
Queue Length Survey
Traffic count team
CCTV survey team
Topo Team survey
On-site Survey team
Driver violation team
Queue lenght survey activities
Indoor survey team-travel speed
Training activities
2023 April (Sihanoukville): Survey and site visit on logistics and port operations.
-Sihanoukville Autonomous Port (PAS): Port Operation and management, Port Infrastructure development, Port planning and expansion, Container handling, Vessel/ship services, Special economic zones, etc.
-Sihanoukville: transport infrastructure development and connectivity, logistics center, dryport, ports, major roads for logistics activities, etc.
Vessel at the PAS Pier
PAS Development Plan
Contrainer truck operations at PAS
Container vessels, loading/unloading
2022 Aug-Sept: (Phnom Penh): Provision of survey for the JICA-LBE-ITC Research Project "How the poor commute in Phnom Penh.
-Interview survey with >500 garment workers in Phnom Penh
-Interview Survey with truck drivers, who transport garment workers
-GPS survey with vehicles, which transport garment workers
Interview with garment workers
Interview with truck drivers
Interview with workers on Remork
Surveyor Team
-2021 February (Phnom Penh): [team leader, CKS] Provision of Resident survey on Citizen well-being in Phnom Penh, under SUTD project "Future Asian Cities -- Citizens Urban Science: Policy and Practice", approximately 1100 interviewed respondents.
SUTD: The Singapore University of Technology and Design.
CKS: The Center for Khmer Studies.
Training activities to all field surveyors
Survey team discussion to improve survey activities after pilot test
Indoor Interview survey activity with citizens, under COVID-19 situation
Outdoor Interview survey activity with citizens, under COVID-19 situation
-2021 January (Sihanouk Ville): Site/construction investigation/survey of PNH-SHV Expressway.
Prestress concrete bridge
compacting base layer
materials and laboratory
factory and materials for construction
-2021 January (Cambodia-Vietnam Borders): Cross-border logistics survey
Bontey Charkry border gate
Export truck carrying rice
Prey Vol border facility
Bavet Zero point zone for transshipping
-2020 August (Phnom Penh): Full traffic Survey of intersection at Kbal Thnol intersection, for Phnom Penh City Hall, to improve traffic flow at intersection.
Traffic count survey team
traffic count activities
Topo survey team
Topo survey activities
-2020 April (Phnom Penh): Primary Survey of physical intersection at Kbal Thnol intersection, for Phnom Penh City Hall traffic assessment.
Pre-site survey activities
road width measure
-2020 March (Phnom Penh): Traffic count survey for JICA PiBO project (Improvement of public bus service using rapid bus lane and priority signalization).
Pre-site survey activities
road width measure
-2020 Jan (Cambodia): Survey of physical Geometry and parking behaviors for secondary streets in Phnom Penh, for Phnom Penh City Hall One-Way traffic study.
Parking & sidewalk survey
road width measure
-2019 Nov (Cambodia): Traffic Count Survey, Speed measurement, Vehicle classification and occupancy for UNDP Urban Study project.
Traffic survey at Ferry
traffic at NR6
traffic in front of airport
Manual traffic count at office
-2019 July & Nov (Cambodia): Traffic survey at several intersections in Phnom Penh for Phnom Penh City Hall Traffic Improvement Study. I am leading a survey team of 20 surveyors, whom i first trained them to fully understand how to collect traffic data including traffic count, vehicle classification, vehicle occupancy, vehicle speed , and intersection geometry via topo survey.
Traffic survey team 2019
Training session
Traffic survey activities
Topo survey
-2018 Dec (Cambodia): A questionnaire-based interview survey was conducted with general citizens (N = 1,200) in Phnom Penh. Eleven surveyors, who were trained to fully understand and administer the questionnaire, visited several locations around Phnom Penh such as schools, markets, terminals, bus stops, and general public places. Respondents were recruited with an incentive gift. The questionnaire contains five parts. Part 1 asked citizens about their general trips. Part 2 first asked them about the RHAs in Phnom Penh. Part 3 asked them about their viewpoints on mass transit system. Part 4 asked them about a stated preference choice. And Part 5 asked about their personal information. The perception questionnaire items were based on a 5-point scale (1: very unlikely, 2: unlikely, 3: neither, 4: likely, and 5: very likely). This study mainly analyzed the data from part 1, 2, and 5.
Survey team 2018 General Citizens
at public area
at Bus terminal
Sample
-2018 Dec (Cambodia): A questionnaire-based interview survey was conducted with Remork and Motodop drivers, who operated without RHAs, in Phnom Penh. The questionnaire was written in Khmer and contains four parts. Part 1 asked the drivers about their general transport services. Part 2 first asked them about the advent year of RHAs in Phnom Penh, and then asked them to report their operational services both before and after the advent of RHAs. Part 3 asked them about their perception toward RHAs. The perception questionnaire items were based on a 5-point scale (1: very unlikely, 2: unlikely, 3: neither, 4: likely, and 5: very likely). And Part 4 asked about personal information. Three surveyors, who were trained to fully understand and administer the questionnaire, visited several locations around Phnom Penh such as markets, major intersections, terminals, bus stops, hotels, and general public places along the city streets. A simple random sampling technique was adopted—the surveyors did not request every driver they saw to join the survey. Instead, for example, they requested only two or three drivers at a pick-up station. This thus allows a wider geographical sampling distribution across the city—i.e., a variety of information would be collected from drivers at several different locations in the city. With budget and time constraints, we tried to maximize our sample size during the survey period. A potential sampling bias could be that our survey locations mainly concentrated around the downtown areas, where more drivers could be spotted, while only a few drivers were recruited at suburban areas. At suburban areas, the demand for transport services via RHAs may not change much. The surveyors requested approximately 280 drivers, but only 217 respondents voluntarily participated in the survey. The drivers rejected our requests because they were busy, tired, waiting for customer, and afraid that the surveyors were possibly advertisers for a company or for a politician. Respondents were recruited with an incentive gift (i.e., a pen). On average, each respondent took 10-12 minutes to answer the questionnaire.
Interview with Remork drivers
Along the city street
-2018 Jan (Cambodia): Four surveyors were trained to fully understand and administered the questionnaire. There were no specific interview locations had been pre-defined. Paratransit drivers operated with RHAs were acquired by three different methods. First, surveyors sought for RHA drivers on city streets by a visual inspection. They approached the drivers whose vehicles were attached with RHA logos. Second, surveyors visited RHA companies. There, the drivers who already registered to RHAs came to pay for the commission fee or have their vehicles maintained. And third, surveyors made a booking via RHAs, calling drivers to a designated location. The shortest trip-distance was selected for minimum fare. Upon arrival, the drivers were queried whether they would participate in the survey. Yet, only four drivers were recruited using this method. The surveyors requested approximately 300 drivers, of which 197 voluntarily participated in the survey.
Training surveyors
Interview with Bajaj RHA drivers
Pilot testing
A few MC Taxi drivers use RHAs in PNH
-2016 May (Cambodia): Qualitative survey with Stakeholders (government official, National road safety committee, road safety expert).
Interview with National Road Safety Committee (left: Dr. Kheang, Mid: HE Voun, Right: Mr. Map
Interview with Mr. Chariya, road safety expert
Interview with Ms Pharinet, government official, urban planning & road safety
-2016 May (Cambodia): A questionnaire survey was conducted with the actual users of Motodops and Remorks (N = 1,000) in Phnom Penh. Eleven surveyors were trained to fully understand and administer the questionnaire. They visited several major destinations around Phnom Penh such as markets, major intersections, intercity bus terminals, and sightseeing places to collect the data. Simple random sampling was adopted:surveyors did not request every person they met to join the survey. They initially observed and then verbally confirmed whether a targeted person travelled by Motodop or Remork on a given day. The interviews were carried out along the streets at suitable places such as along the sidewalks, under the trees, or in front of a market.
Briefing with survey team 2016
With intercity travelers at terminal
with local transport users
with suburban transport user
-2014 Dec (Cambodia): Four surveyors, who were trained to fully understand and administer the questionnaire, conducted face-to-face interview surveys with appoximately 200 paratransit drivers in Phnom Penh. The questionnaire contained four sections. Section 1 asked about paratransit services in general and paratransit vehicles. Sections 2 asked about the fare levels defined by paratransit drivers for different pre-defined ODs and number of passengers. Section 3 asked about subjectives evaluation on paratransit operations. and Section 4 asked about personal information. The surveyors visited several locations including nera major road intersections, markets, and airport. Targeted respondents were drivers of Motodops and Remorks. Surveyors randomly requested drivers, who were waiting for passengers at their pick-up points. GPS for each mode was also used to obtained travel route and speed.
Interview with Paratransit drivers 2014
Interview with Paratransit drivers 2014
GPS survey
Survey team
-2015 Mar (Cambodia): Qualitative interview survey with stakeholder of paratransit services in Cambodia. Interviewees include heads of labor association, driver association, and owners of Remork manufacturers.
Interview with head of Cambodia for Confederation Development Association (CCDA) 2015
Interview with head of Independent Democracy of Informal Economy Association (IDEA) 2015
Interview with head of Cambodia Labour Confederation (CDC) 2015
Interview with head of TTTA and TAPP Airport 2015
-2014 Feb (Cambodia): Eight surveyors were trainned to fully understand and adminster the survey questionnaire. The face-to-face interviews took place with N = 1,100 bus passengers on-board (547 of which were female). Collected information included personal characteristics, trip purpose, previous travel modes before public bus services were available, access/egress distance to/from a bus stop, and subjective questions.
Poster for interview survey 2014
Interview with bus users on-board
-2013 May-June (Phillipines): The interview survey was conducted in Manila by three experienced interviewers, who were trained to fully understand and administer the questionnaire. The interview was conducted in Tagalog so that the local residents would clearly understand the content of the questionnaire, although many of the Filipinos who were questioned could actually understand English. The interviewers were accompanied by a local coordinator, who was known to the general residents and who was appointed by the local authorities to assist in the survey activities. The interviews took place both inside and outside the dwellings, depending on security issues and privacy concerns. The survey team did not visit every house, as they were aware it was lunchtime. The team visited approximately 500 houses, and 341 responses were obtained.
Interview with local Manila citizens
local Filipino citizens indoor
local Filipino citizens outdoor
interview from outside of fence
-2012 July (Japan): Two well-trained instructors conducted the headphone experiment interviews at two location: inside a Tokyo Tech Library and inside a room of 3.6 m x 6.4 m x 2.5m. The background sound level was monitored and did not exceed 40 dBA, the lowest limite of urban ambient sound in daytime hours. During interview about 60 normal-hearing respondesnts (or subjects) were instructured to properly wear the heaphone to minimize the effects of passive noise. After hearing different noise level, respondents were asked about their perception and noise tolerability level.
Noise experiment instruments
experiment with subjects