AASHTO Design Questions

AASHTO Design Questions

@ in the 1950s – the Blue Book

a. 1930s

b. 1940s

*c. 1950s

d. 1960s

Which AASHTO assumptions apply to road design for roads such as Bearss Ave? 1 worn tires 2 dry pavement 3 above average drivers 4 3.75' driver eye height

@ only worn tires

*a. 1 only

b. 1, 3

c. 2, 3

d. 2, 3, 4

The AASHTO stopping distance for a driver driving the design speed on Bearss Ave is most nearly:

@S=P&R + Stopping = 2.5(45*88/60) + (45*88/60)^2/(2*30*0.348)= 374.22

a. 375

b. 475

*c. 575

d. 675

If the design speed were adjusted so the safe stopping distance S was 500 for a driver going eastbound in the right (slow) lane, the "clear zone" M for adequate horizontal sight distance is most nearly:

@ adjust the radius to R' on the center of the inside lane R' = 926, M= R' – R'*cos(S/2R') = 31.6

a. 20 ft

*b. 30

c. 40

d. 50

Of the following, how many are AASHTO presumptions that apply to Bearss Ave? 1. dry pavt 2. new tires 3. driver’s eye height 4.25 4. height of stopping object 0.50 ft:

@ Ans: None apply. AASHTO presumes wet pavement, worn tires, 3.50 eye height, 2.0 stopping object.

*a. 0

b. 1

c. 2

d. 4

If the stopping friction factor is 0.347, the required stopping sight distance on Bearss Ave is most nearly:

@ Ans: S = D percept&react + D braking = 2.5 * 45 * 88/60 +(45*88/60)^2/(2*30*.347) S = 165 + 209.22 = 347.2

a. 250 ft

b. 300 ft

*c. 350 ft

d. 400 ft

If driver on Cozumel Dr. stops at a stop sign when approaching Bearss, the ISD (intersection sight distance) required for a safe left turn on Bearss is most nearly:

@ Answer: ISD = 7.5 second time gap * 45 mph * 88/60 conversion to fps = 462 ft

a. 300 ft

b. 350

c. 400

*d. 450

What is the Intersection Sight Distance ISD required by ABET for a car stopped at Lake Magdalene Drive wishing to make a left turn on Bearss Ave?

@ ISD = 45*88/60* a time gap of 7.5 sec= 495 ft.

a. 450

*b. 500

c. 550

d. 600

Project Time Flow Question

What is the proper order of steps in the time flow of a route project such as Bearss Ave? 1. alignment design, 2. final engineering design 3. corridor selection 4. right of way acquisition 5. award contract

@ Ans: concept, corridor selection, alignment design, right of way and final engineering design concurrent, award contract.

a. 1, 3, 2, 4, 5

b. 3, 1&2 concurrent, 5, 4

*c. 3, 1, 2&4 concurrent, 5

d. 5, 1, 2, 3&4 concurrent

Of the following, which two "phases" of the Bearss Ave. project were probably conducted simultaneously? 1 alignment design 2 final engineering design 3 corridor selection 4 right of way acquisition 5 construction

@ final engineering design of plans production and right of way acquisition

a. 1, 3

b. 4, 5

c. 3, 4

*d. 2, 4

Which are steps employed in "corridor selection" for a road such as Bearss Avenue? 1 topo mapping of contours 2 aerial photo mosaic 3 traffic problems identified 4 public hearing 5 cost/benefit analysis 6 plans production

@ mosaic is used to identify alternate corridors leading to a cost/benefit analysis and public hearing

a. 1, 3, 4

b. 2, 3, 5

c. 3, 4, 5

*d. 2, 4, 5

On the Bearss Ave plans cover sheet, the project length between the westerly point labeled "Station Equation" and the easterly point labeled "Station Equation" is most nearly:

@Dist = BK station of easterly point 19330 – AH station of westerly point 13458 = 5872.

a. 5850 ft

b. 5860

*c. 5870

d. 5880

How many plan profile sheets are included in the Bearss Ave plan set?

@ the index shows sheets 14 thru 21 = 8 sheets

a. 7

*b. 8

c. 9

d. 10

Using the typical sections at station 130, 40 ft right of the baseline, the cross slope of the design surface is most near is most nearly:

@ Ans: At Sta 130, typical section #1 governs. 40 ft right is on the shoulder, slope 6%

a. 2%

b. 4%

*c. 6%

d. 10%

The basic use of the contours and drainage divide lines on the drainage page is to:

@ size culvert pipe, using the drainage basin acreage and the rational formula for Q, and then Manning's formula for pipe diameter.

a. determine land values

b. calculate pipe slopes

c. determine flood zones

*d. size culvert pipes

For the Bearss Ave project, who is the “owner” that paid for it?

@ Ans: HillsboroughCounty

a. city

*b. county

c. state

d. federal govt.

How many hours of notice is the contractor required to give utility companies for utility relocations on the Bearss Ave. project?

@ the second sheet Note 4 says 48 hrs.

a. 24

b. 36

*d. 48

e. 72

The quantity of Type E Curb and Gutter is most nearly:

@ Ans: The quantity sheet shows 10,615 lineal ft

a. 9,000

b. 10,000

*c. 11,000

d. 12,000

At Station 130, what is the slope of the proposed surface 40 ft right of the project centerline?

@ Typical section #1 applies at sta 130, 40 ft right is on the shoulder, slope 6%.

a. 0%

b. 2%

c. 4%

*d. 6%

On Bearss Ave, how many CY of cut (excavation) is in the roadway exclusive of retention ponds?

@ Plans show 22,686 CY of roadway excavation.

*a. 23,000CY

b. 28,000

c. 33,000

d. 38,000

The square yards of "seed and mulch" for grass planting on Bearss Ave. is most nearly:

@ the quantity page shows 6,911 SY

a. 5000 SY

b. 6000

*c. 7000

d. 8000

What physical object is located at Sta 165, 150 ft left?

@ the plan sheet shows a 2 Sty Frame House

a. manhole

b. retention pond

*c. frame house

d. tennis courts