Geometric Design Standards for Rural Roads in Hill Areas (Reviews)

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 Review of Geometric Design Standards for Rural Roads in Hill Areas S. No. 1.

2.

Item Classification

Carriageway width

As per IRC:SP:20 (Rural Roads Manual) / Hill Road Manual IRC:SP:48 (a) Other District Roads

Amendments Recommended New Construction

Same system as defined in NRRDA Same system as defined in NRRDA guidelines guidelines

(b) Village Roads 3.75m but can be reduced to 3.00m Through Roads ± 3.75 m where traffic less than 100 motorised vehicles per day. Link Roads* ± 3.00 m

c

Through Roads Existing roads with carriageway 3.0 m or more can wait unless evidence of safety hazard.

If a link road carries Link Roads traffic more than 100 motorised As for new construction. vehicles per day, the carriageway width will be 3.75 m. Roadway width 6m in SP:20 (virtually 6.7 m (a) Through Roads: 6.0 m (including Existing roads with formation upto 5.0m may wait. minimum including parapet and drain) parapet and drain) Notes: 5.95 m in Hill Road Manual for (b) Link Roads: 6.0 m (including (i) In hard rock stretches, an additional tolerance ODR parapet and drain) of 0.5 m can be considered i.e. existing roads with formation width upto 4.5 m may wait. 5.20 m in Hill Road Manual for VR Notes (ii) For curves see item 4 below. The width indicated is for roads in straight. This is to be increased on (iii) Provide passing places at suitable locations. horizontal curves. c *

3.

Existing Roads (Tolerances that can be accepted)

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S. No.

Item

As per IRC:SP:20 (Rural Roads Manual) / Hill Road Manual IRC:SP:48

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