senlis
Civil/Environmental
- Jul 27, 2011
- 2
I'm currently working on a project where the access road to a small residential development connects to an existing two-lane two-way road at right angle.
The existing road has a posted speed of 80 kph. The access road is a dual carriageway with a posted speed of 40 kph. The roads and the project site are situated in a rural area where there are no adjacent developments and where traffic volumes are low. I only have initial traffic information entering the site---about 5-10 buses and 500 cars a day.
I have initially designed the connection as a simple junction. However, I was told that auxiliary lanes are required (acceleration/deceleration lanes) due to the posted speed of the existing road. But traffic volumes should also be taken into account, correct?
I don't have much experience on this and any advise/inputs will be greatly appreciated. What do you think? I am concerned that providing auxiliary lanes for this situation might be an overkill and would pose higher construction costs for the Client.
Thanks in advance.
The existing road has a posted speed of 80 kph. The access road is a dual carriageway with a posted speed of 40 kph. The roads and the project site are situated in a rural area where there are no adjacent developments and where traffic volumes are low. I only have initial traffic information entering the site---about 5-10 buses and 500 cars a day.
I have initially designed the connection as a simple junction. However, I was told that auxiliary lanes are required (acceleration/deceleration lanes) due to the posted speed of the existing road. But traffic volumes should also be taken into account, correct?
I don't have much experience on this and any advise/inputs will be greatly appreciated. What do you think? I am concerned that providing auxiliary lanes for this situation might be an overkill and would pose higher construction costs for the Client.
Thanks in advance.