When printing you can try choosing landscape layout for better placement on A4 paper
1) Draw a rectangle that will define the conditional proportions and boundaries of the chosen drawing.
2) From the middle of the rectangle, draw one vertical and one horizontal line equally dividing the shape.
3) Draw another horizontal line equally dividing the upper half of the rectangle. Similarly, draw a horizontal line equally dividing the bottom half of the rectangle.
4) Draw a vertical line equally dividing the left half of the rectangle. Similarly, draw a vertical line equally dividing the right half of the rectangle.
Mark off the width and height of the London taxi cab. Define its proportions. Draw ovals that will become wheels.
With straight and smooth lines, mark the general shape of the front part and the windscreen.
Outline the trunk, the right side and the grilles of the cab.
Add ovals for lights. From one of the lights draw a curved line to the rear part of the cab.
Draw additional lines to specify the body shape.
Outline the wheel covers. Work on adding new parts and components such as windows, the windscreen and doors.
Add more lines to illustrate the shape, outline the lights, a face bar and a number plate.
Define the places for new parts and components.
Contour; add more details. Delineate trees and houses. Erase all the guidelines.