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16-Civ-B7 Transportation Planning and Engineering: May 2016

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 Crest Vertical Curve — Minimum Length and Stationing
  2. Question 2 Horizontal Curve Design and Superelevation Development
  3. Question 3 Intersection Sight Distance and Pavement Distress
  4. Question 4 Flexible Pavement Design by the AASHTO Method
  5. Question 5 Subgrade Intrusion and Trench-Drain Capacity
  6. Question 6 Asphalt Mixture Volumetrics and Field Compaction Control
  7. Question 7 Serviceability, Overlay Design and Concrete Moduli

Start with Question 1 →

Paper format. 98-Civ-B7 Highway Engineering, National Examinations, May 2016. Three hours, open book, any non-communicating calculator. Seven questions of equal value (20 marks each); the marking scheme printed on page 1 splits them as 1(a) 15 / 1(b) 5, 2 — 20, 3(a) 6 / 3(b) 14, 4 — 20, 5(a) 10 / 5(b) 10, 6(a) 12 / 6(b) 8, 7(a) 7 / 7(b) 7 / 7(c) 6. A total of five solutions is required and only the first five in the answer book are marked; all seven are solved here, because the set is a study resource rather than a graded script. Note 2 of the paper expressly permits assuming any datum that is needed but not given — every such assumption is flagged below in a callout.

Reference texts. Garber & Hoel, Traffic and Highway Engineering, 5th ed. (geometric design, sight distance, pavement design); Transportation Association of Canada, Geometric Design Guide for Canadian Roads (TAC GDG — design speed, stopping sight distance, Table B.3.1.4a superelevation and spiral parameters, superelevation development); AASHTO, Guide for Design of Pavement Structures (1993) (ESAL, structural number, reliability, overlay design); Asphalt Institute, Asphalt Mix Design Methods (MS-2), 7th ed. (mixture volumetrics); Mamlouk & Zaniewski, Materials for Civil and Construction Engineers, 4th ed. (compaction control, concrete moduli); TAC, Pavement Asset Design and Management Guide (distress identification and classification); Das, Principles of Geotechnical Engineering, 9th ed. (filter criteria, grain-size distribution).

Check — design-domain values adopted under Note 2. The paper names road classes (RCU80, UCU80, URU80) without reproducing the TAC design-domain tables, so the following standard Canadian values are adopted and used consistently throughout: design stopping sight distance 130 m at 80 km/h on level grade; side-friction factor f = 0.14 at 80 km/h; AASHTO 1993 lane-distribution factor DL = 0.90 for two lanes in each direction; drainage coefficients m = 1.0; acceleration of a stopped single-unit truck 1.5 m/s2. Each is quantified for sensitivity where it changes an answer.