Arboriculture & Urban Forestry 48(4): July 2022 could be obtained with the assistance of the confi- dence intervals of regression coefficients. Most logis- tic and multiple regression models for the occurrence and magnitude of protruding roots and/or flares were significant. In many cases, the odds ratio of protrud- ing roots and/or flares increased with DBH. On the other hand, the length of protruding roots and/or flares increased with open soil area. Using the regression coefficients and the intercepts summarised in the tables, it is possible to estimate the likelihood and possible extent of protrusion. In an urban planning context where pavements are dotted with trees, the selection and care of trees can be informed using the quantita- tive approach demonstrated in this study. 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Journal of Arboricul- ture. 28(6):277-282. https://doi.org/10.48044/jauf.2002.041 Day SD, Harris JR. 2008. Growth, survival, and root system morphology of deeply planted Corylus colurna 7 years after transplanting and the effects of root collar excavation. Urban Forestry & Urban Greening. 7(2):119-128. https://doi.org/10 .1016/j.ufug.2007.12.004 Day SD, Watson G, Wiseman PE, Harris JR. 2009. Causes and consequences of deep structural roots in urban trees: From nursery production to landscape establishment. Arboriculture & Urban Forestry. 35(4):182-191. https://doi.org/10.48044/ jauf.2009.031 Ebrahimian A, Gulliver JS, Wilson BN. 2018. Estimating effective impervious area in urban watersheds using land cover, soil character and asymptotic curve number. Hydrological Sciences Journal. 63(4):513-526. https://doi.org/10.1080/02626667 .2018.1440562 Gilman EF, Grabosky J. 2011. Quercus virginiana root attributes and lateral stability after planting at different depths. 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