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<h2 id="see-also">See also</h2> <ul><li><a href="/facts/Highway_engineering/RUcu1E8n">Highway engineering</a></li> <li><a href="/facts/Road_construction/3aadH4s3">Road construction</a></li> <li><a href="/facts/Road_surface/m80ermWq">Road surface</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Lay, M. G. (2009). Handbook of Road Technology (4 ed.). Taylor & Francis. ISBN 978-0203892534. <a href="978-0203892534" target="_blank">978-0203892534</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Phatak, D. R.; Gite, H. K. Highway Engineering. Nirali Prakashan. ISBN 978-8185790923. <a href="978-8185790923" target="_blank">978-8185790923</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> </ol>