Land Allocated to Street (LAS) is an important factor that influence connectivity in urban areas (UN HABITAT, 2013). It is also a part of an indicator of Sustainable Development Goal 11 Indicator 11.7.1 : Average share of the built-up area of cities that is open space for public use for all, by sex, age and persons with disabilities which is the proportion of total surface of open public space and total surface of land allocated to street to total surface of built up area of the urban agglomeration. The average LAS of cities in developed countries is 29% (UN HABITAT, 2013). In contrast, only 12% of total area is allocated to road networks in Bangkok, the biggest and the capital city of Thailand. The number indicates insufficient road infrastructure which can be improved.

Thus, I observe and analyze percent LAS and percent of urban areas of 222 Thai cities (Tessaban Nakhon, Tessaban Mueang, Bangkok, and Pattaya) using Tessaban shapefile (NESDC, 2020), OSM road layer (Open Street Map, 2020) with area estimation using Thailand Department of Highway’s road design standards, and Global Human Settlement – Settlement Model grid (GHS-SMOD, European Commission, 2020). Here are some findings:

• Percent LAS is found to have positive correlation with percent urban areas as expected.
• Average LAS is 7.47% which is a quarter of the average LAS of cities in develop countries.
• The highest LAS is Tessaban Mueang Sri Racha (เทศบาลเมืองศรีราชา) 19.09%.
• We can imply that cities below the trend line are cities with low share of LAS and need