Customized version of https://www.thingiverse.com/thing:615256

Created with Customizer! https://www.thingiverse.com/apps/customizer/run?thing_id=615256

Using the following options:

block_width = 5
block_length = 6
block_height_ratio = 1
block_type = brick
block_brand = lego
stud_type = hollow
block_bottom_type = open
include_wall_splines = yes
technic_holes = yes
vertical_axle_holes = no
wing_type = full
wing_end_width = 2
wing_base_length = 3
wing_stud_notches = yes
slope_stud_rows = 1
slope_end_height = 0
curve_stud_rows = 5
curve_type = concave
curve_end_height = 0
roadway_width = 0
roadway_length = 0
roadway_x = 0
roadway_y = 0
round_radius = 3
round_stud_notches = yes
dual_sided = no
dual_bottom = no
use_reinforcement = no
stud_rescale = 1.00
stud_top_roundness = 0