Road Design assignment

The objective of this assignment is to apply what you have learned to design a road connecting

two existing roads. The attached map shows the tangents $($in bold$)$ that you will use in your

design. You will need to design one horizontal curve and a complete vertical alignment.

Design criteria for the entire alignment

Design speed is $55MPH.$

$2$ lane undivided road $(1$ lane each direction$)$ with $12\text{'}$ lanes.

The road should have $6\text{'}$ shoulders.

ROW is $50\text{'}.$

Crown: $\frac{1}{4}"/$foot

Shoulder slope: $3\%$

Maximum side slopes: $3$:$1($this is the slope from the shoulder to existing ground in X$-$section

view$).$ If you need steeper than a $3$:$1$ slope to meet existing ground, you will assume guard rail is

required. You'll need to identify what slope is required if steeper than $3$:$1$ only for locations

where you draw cross sections $($see below$)$

Maximum grades: $8\%$

Maximum superelevation is $6\%$

You should consider sight distance.

Note: the road should be near level at the intersections with the existing two roads.

Required

Plan and profile sheet$($s$)$ of the horizontal and vertical alignment. This can be done directly on

the topo map provided or you may want to transfer to a separate sheet.

A sample plan and profile sheet is shown in Figure $7\mathrm{.}2$ in the text.

All drawings must be drawn to scale $($make sure you specify the scale$).$ They should be neatly

drawn BY HAND using a straight edge and other drawing aids as appropriate.

Horizontal Alignment. For the horizontal alignment, the design should

be stationed appropriately, and include curve details. For stationing, I suggest tick marks every

$100\text{'}$ and station labels every $500\text{'}.$ You must also include station labels at the PC$,$ PI$,$ PT$,$ etc.

Vertical Alignment. For the vertical alignment, your design should try to minimize

earthwork. You should exaggerate the vertical scale. Be sure to include the grades and critical

vertical curve info. You will likely need more than $1$ vertical curve.

Sample cross sections. You must include a sheet$($s$)$ that show cross sections for station $0+00,$

the PC$,$ and first whole station after the PC$.$ Don't forget to consider superelevation. This

should on engineering paper.

Other. Make sure that you include any calculations that you made. You must show that you

have adequate sight distance through your vertical curves. One more note, you will need to

interpolate elevations from the contour map.

please show final design drawing