The phrase 'causing a bottleneck' is correct and usable in written English.
It can be used to refer to a situation where a process or activity is hindered because of too much activity in the same area or too little resources in proportion to the activity. For example, "The number of orders receieved was so overwhelming that it caused a bottleneck in the shipping process."
The country is struggling to accommodate a wave of migrants crossing the Mediterranean from north Africa, and a crackdown on security at the borders with France and Austria has exacerbated the situation, causing a bottleneck at Italy's train stations.
(Sellers beware: your own broker could be causing a bottleneck by clustering appointments together for his or her own convenience. Make sure your broker has a backup plan in the form of a colleague or assistant who can cover).
With respect to the dual-task information-processing model, the results showed that the central information-processing model would include a sequence model for tasks that use the same perception resource, causing a bottleneck in information processing.
"The one outside our hotel is just causing a bottleneck on the street.
One stop is outside the Red Lion Hotel in Milford Street, but its manager said it was not suitable and was causing a bottleneck on the road.
Yet, analysis of the spectrum bands clearly indicate that current FCC policies have created severely under-utilized channels, causing a bottleneck for new wireless services [1, 3, 4].
The illegal truckers' strike that caused a bottleneck at the port of Montreal for the last month has ended as 900 independent drivers have returned to work.
Thousands of fans caused a bottleneck at the entrance to the HSBC Champions in Shanghai, all of them eager to see the Sunday showdown between Phil Mickelson and Tiger Woods.
The first bit is a multi-lane highway, but then as you go north it shrinks to two lanes and causes a bottleneck".
A spokesman for the London Organising Committee of the Olympic and Paralympic Games (Locog) said the high demand had caused a "bottleneck" in the system.
