Find the Design Speed for Mainline (I-10) by 23-09-22

[CarbonFlora]

Questions

What is the Minimum Design Speed for this type of facility?

What is the Design Speed of the roadway segment?

What is the horizon year for this project?

[TheJ0hns0n]

I10 Mainline :

Facility Type : LIMITED ACCESS HIGHWAYS : Freeways in urban areas 55-80 mph (70 mph and 55 mph for trucks)

E. Ramsey :

On Ramp: (I10 East Entrance) Facility Type : CONVENTIONAL HIGHWAYS : Rural : Main Streets – Cities, Towns, and Community Centers 30-40 : 40 mph posted (City to on ramp) Facility Type : LOCAL FACILITIES : Facilities connecting to a freeway or expressway 35/45 : 35 mph posted (on ramp entrance) Off Ramp: (Exit 102) Facility Type : LOCAL FACILITIES : Facilities connecting to a freeway or expressway 35/45 : 45 mph posted (off ramp exit) Facility Type : CONVENTIONAL HIGHWAYS : Rural : Main Streets – Cities, Towns, and Community Centers 30-40 : 40 mph posted (Off ramp into city)

Completion year : 2030 Horizon year : 2050

[TheJ0hns0n]

https://www.2fixyourtrafficticket.com/i10-fwy-70-mph-speed-limit-in-riverside-county.html

[TheJ0hns0n]

[TheJ0hns0n]

[TheJ0hns0n]

[TheJ0hns0n]

[TheJ0hns0n]

Slows down to 60 mph when entering the urban area near Cabazon

[Mhn110]

What is the minimum design speed for this type of facility? The design speed for freeways in urban areas is 55-80 mph. (Table 101.2 HDM)

What is the Design Speed of the roadway segment? Main St. Conventional Highway: Flat terrain 55-70 mph (Table 101.2 HDM) Main Streets – Cities, Towns, and Community Centers 30-40 mph (Table 101.2 HDM)

45 mph along Main St northeast bound. (before off and on ramp eastbound I-10) No visible speed limit sign on Seminole Dr.

What is the horizon year for this project? Completion year 2030 (7 years) Horizon year 2050 (27 years)

[kfwangg]

1. Design Speed:

The design speed for limited access freeways in rural areas is 55 mph -80 mph according to HDM Table 101.2

2. Design Speed of Roadway Segment (Main):

According to Table 101.2 of the HDM, for conventional highways in rural areas on flat terrain is 55 mph - 70 mph and for main streets it is 30 mph - 40 mph.

When looking on google earth and google maps, there is no speed limit posted on Seminole Dr. pr at least none that can be seen. However, the speed limit on Main St. is 45 mph (photo attached).

3.Horizon Period = 20 years

Horizon Year = 2050 Completion Year: 2030

See Speed Limits Below:

[Qhuynh1881]

1. What is the Minimum Design Speed for this type of facility?

   • Based on the attached map, I10 Mainline is in both urban and rural areas. According to HDM Table 101.2, the design speed for limited-access freeways in rural areas is 70-80mph, and for limited-access freeways in urban areas is 55-80mph.

2. What is the Design Speed of the roadway segment? (Main St.):

   • Main St. is located in the rural area. According to HDM Table 101.2, the design speed for flat terrain is 55 mph - 70 mph, and for main streets is 30 mph - 40 mph.

• Based on Google Earth, the speed limit for Main St. is 45mph.

  

• And about 35mph for Seminole Dr

  

What is the horizon year for this project?

• Completion year: 2030
• Horizon year: 2050

[PPMN4]

What is the Minimum Design Speed for this type of facility? The minimum design speed for this type of facility (I-10 Mainline) is 55-70 mph.

What is the Design Speed of the roadway segment? The design speed for roadway segments should be 30-40 mph. (Note: speed limit posted for Ramsey Street and Main Street is 45 mph).

What is the horizon year for this project? The Horizon year for this project is expected to be 2050.

[dschhen]

A limited access highway (freeway) in a rural area is 70-80 mph according to Table 101.1 of the HDM. For an urban area, it is 55-80 mph. Areas to the west of our project are more urbanized than those to the east. We should consider the future growth and needs of the cities when choosing our design speed.

The design speed for rural, flat, conventional highways is 55-70 mph and for rural main streets is 30-40 mph.

Our horizon year for our project is 2050 according to Justine, Jason, and Professor Zhang. Our project completion year is 2030.

[JThomas9104]

What is the Minimum Design Speed for this type of facility? The current facility is closely identified as Figure 502.2, Type L-7 facility, consider 504.2 (4)(a) Freeway exit requires a Minimum Design speed of 50 mph or greater for ramps and connectors. Consider 504.2 (4)(b) Freeway Entrance—The design speed at the inlet nose should be consistent with approach alignment standards. If the approach is a branch connection or diamond ramp with high alignment standards, the design speed should be at least 50 miles per hour. Consider 504.3 Ramps (1)(a) When ramps terminate at an intersection at which all traffic is expected to make a turning movement, the minimum design speed along the ramp should be 25 miles per hour. When a “through” movement is provided at the ramp terminus, the minimum ramp design speed should meet or exceed the design speed of the highway facility for which the through movement is provided.

Eastbound onramp: min 50 mph if horizontal alignment design allows it, progressively increasing to highway speed as curve straightens. East bound off ramp: Min 50 mph for the first 525 ft, then slows to 25mph for the stop curve. West bound onramp: min 50 mph if horizontal alignment design allows it, progressively increasing to highway speed as curve straightens. West bound off ramp: Min 50 mph for the first 525 ft, then slows to 25mph for the stop curve.

Consider google maps, Eastbound off ramp states 30 mph for trucks. This is most likely considering 504.3 Ramps (1)(a) When ramps terminate at an intersection at which all traffic is expected to make a turning movement, the minimum design speed along the ramp should be 25 miles per hour, the SSD, corner sight distance, and negative grade.

Consider google maps, Eastbound off ramp, no posted speed for trucks, this is most likely considering the same factors for the opposing offramp. This case has a positive grade and larger radius.

What is the Design Speed of the roadway segment? Consider index 101.1 (2)(c)(2) Where the local facility connects to a freeway or expressway (such as ramp terminal intersections), the design speed of the local facility shall be a minimum of 35 miles per hour. However, the design speed should be 45 miles per hour when feasible.

Consider google maps, 45 mph along Main St northeast bound. This agrees with index 101.1 (2)(c)(2).

Consider Table 101.2, Limited access highways, Expressways in urban areas 50-70 Consider Table 101.2, conventional highways, Main Streets – Cities, Towns, and Community Centers 30-40

Consider google map signage, Main North and South bound is 30 mph turning onto the bridge and travelling over the I-10. This is most likely calculated from Topic 405, 405.1(2) Corner Sight Distance. (a) The minimum corner sight distance (feet) should be determined by the equation: 1.47VmTg, where Vm is the design speed (mph) of the major road and Tg is the time gap (seconds) for the minor road vehicle to enter the major road. The values given in Table 405.1A should be used to determine Tg based on the design vehicle, the type of maneuver, and whether the stopped vehicle’s rear wheels are on an upgrade exceeding 3 percent. The distance from the edge of traveled way to the rear wheels at the minor road stop location should be assumed as: 20 feet for a passenger car, 30 feet for a single-unit truck, and 72 feet for a combination truck.

Consider table 405.1B, stopping and decision sight distance along with Corner sight distance should be evaluated for interstate facilities.

What is the horizon year for this project? Completion year 2030 (7 years) Horizon year 2050 (27 years)